The company Zagg is pretty well known for invisibleShield, its tough film protective layer which covers portable electronics. It is introducing some new layers this week targeted at the newly released iPod nano, touch and classic.

Zagg’s invisibleShield, according to the company, “is made from a patented adhesive film exclusive to the company.” It is said to have been “originally utilized by the U.S. military to protect helicopter blades from wind, sand and the wear and tear of high-speed travel.” It is 0.2mm thick and custom cut to match specifics of each iPod model.

iSkin, a maker of protective gear for your iPods and iPhones, recently debuted a case and armstrap for iPod nano 3G owners who like to their players for a jog or to workout at a gym. It is called the iSkin DuoBand for iPod nano 3G and you’ll find it pricing around $40.

The iSkin DuoBand for iPod nano 3G includes a soft silicone layer with another harder layer set in a metallic finish. These two layers reportedly work together to protect your nano from most forms of damage, though we imagine it won’t do much if you drop a weight on it.

GizMac Accessories, a maker of add ons for iPods and iPhones, recently unveiled some new third generation iPod nano cases. These are called the GizMac Aluminate and GizMac DuraSport. Pricing is set at around $30 for both.

The GizMac Aluminate protects the nano in a mixed shell of aluminum. Built-in screen and click wheel protectors also exist. Accessories which come with the Aluminate include a lanyard and a carabiner clip.

This is for anyone who thinks that celebrities dressing up tiny dogs is oh so cute. Well, that trend may be on it’s way out, so why not dress up your iPod? Maybe it needs a wardrobe makeover. If you’re bored with your current gadget skins the iPod Hoodie is definitely different. If you don’t have a tiny animal to dress, this would be the way to go.

It looks just like the hoodies you wear, but more ridiculous as it is on a small iPod. They’re even made out of real sweat shirt material. The iHoodies come in shapes compatible with the iPod Touch, Nano, Video Nano and iPod mini, and cost between £9.99 and £10.99 or about $20. Think of all the fun you can have dressing your various devices and having lovely little tea parties. Why, the hoodie is a perfect way to recreate Eminem in the “8 Mile” movie.

iFrogz announced the release of Thumpz, today at CES 2008 in Las Vegas. Thumpz is currently designed for the 3rd generation iPod nano and will also be available for the iPod Classic and incorporated into the Tadpole case. It’s a 100% silicone case with speaker that gives you a compact, more stylish way to listen to music.

The new Thumpz uses a passive speaker technology that offers great sound without the added bulk of batteries. Just slide the iPod into speaker case and connect through the headphone jack. It only extends the length of the iPod about an inch. It claims to give you full protection and you can still share your music and videos without the need to remove the case or plug it into other speakers.

iPod case maker iSkin has unveiled a new case for the iPod classic which is made of silicone. The iSkin eVo3 classic is priced at around $35.

The iSkin eVo3 classic is described by iSkin as being “precision-molded with premium silicone” to provide “maximum 360-degree protection without added bulk.” It is also coated with a special finish over the screen which iSkin says leaves the iPod classic fully viewable while protecting against scratches.

iFrogz is targeting owners of the third generation iPod nano with a semi-translucent hard case. The new iFrogz 3rd Gen Nano Crystal Cases are priced at around $13 or $18 if you add some click wheel art.

The iFrogz 3rd Gen Nano Crystal Cases are available in a variety of colors, including pink, purple, orange, green, yellow and light blue. They protect your nano from scratches by covering it while also offering full access to the scroll wheel, headphone jack and other ports. The screen is also fully covered by the case.

Does your iPod yearn for more than the average looking case? How about one set in 14-karat gold. Metallo Design, a designer of luxury products, is set to outfit your iPod in its own take on iPod cases. The new Gilty Couture line prices from around $55 to $200.

The Gilty Couture cases are made of metal and designed to protect your iPod as any other hard case would. Where they vary is that each hand-crafted case “eatures brilliant bezel style settings with opulent Swarovski crystals, and each piece is draped in 14-karat gold or silver jewelry quality plating.”

As surely as new days dawn so do new iPod cases regularly make their way to market. This time around we have the quiet, recent introduction of the PDO TopSkin for iPod Classic, priced at around $20.

The PDO TopSkin for iPod Classic is in many ways your typical, somewhat stylish iPod case. It fits the 80GB or 160GB iPod classic model and comes in four body colors. There’s a clear plastic screen protector which sits in a groove inside the case to keep it in place. A layer of “silicone protection” keeps your player relatively safe, with a “play-through design” so that functions like the Click Wheel can be interacted with.

iSkin is a product developer well known for its innovative and useful iPod cases. The company is now in the process of updating its line with new cases to fit the most recent classic and nano iPod designs. These cases include the Claro for classic (around $40), evo4 Duo for classic (around $35) and Duo for nano (around $30).

The iSkin Claro for the iPod classic is an outer polycarbonate shell coated with an anti-scratch technology. It’s combined with a silicone inside design for double protection and also includes screen protection and a variety of inner silicone layers to customize your case’s look. The evo4 for the iPod classic, meanwhile, offers protection in the form of a silicone skin with a full-frontal polycarbonate screen. It has stylish looks, integrated covers for the iPod’s ports and a variety of body colors.

Today Marware launched four new decently priced iPod cases targeting the new 3rd generation video iPod nano, one of which being the Sportsuit Relay, combining two cases in one.

The Sportsuit relay case is created to hold both the new iPod nano and the Nike + iPod Sport Kit receiver and sensor, and includes a small sensor pouch that weaves into the laces of almost any running shoe along with a wristband carrying case. An expansion component to the case lets you also wear the iPod nano on your wrist along with it.

Marware’s other cases for the new video nano include the Sportsuit Runabout, Sportsuit Convertible and the SportGrip. The Sportsuit Runabout case encloses the face of the iPod in a clear plastic case with an adjustable …