The onslaught of iPhone 3G cases continues with several recently announced offerings from iPod accessories maker iFrogz. These new cases are the Wrapz, Treadz and Luxe. The first two price around $15, while the Luxe is around $20.

All three cases are available now in a variety of colors. iFrogz says the basic design of the Wrapz case offers 100 percent silicone encasement, while the Treadz case offers an “extra-thick” silicone casing and a tire tread design. The Luxe case, meanwhile, provides protection with a hard, plastic shell, finished with a metallic facade and a “soft …

Speck, which just the other day said it was shipping a new iPod 3G translucent hard shell case, is back today with a new rugged case for the same mobile. It’s called the ToughSkin for 3G and it prices around $35.

The ToughSkin for 3G offers up a treaded texture for extra grip and comfort, a rubberized skin with slightly thicker corners for protection and a hinged bottom that can be pulled back for docking while in the case. Included is a detachable holster and swivel belt-clip. It is available now.

Speck

The march of new iPhone 3G cases continues with a translucent hard shell case from Speck. It is called the SeeThru Hard Shell for iPhone 3G and pricing puts it around $30.

The  offers what Speck says is a slim profile design. Rubberized finger grips help prevent slippage and the two piece, snap design includes a removable bottom for docking. The bottom of this case also serves as a stand for the iPhone 3G when detached.

Popular iPod case manufacturer iSkin is introducing a new case accessory specifically designed for the new Apple iPhone 3G. It is called the iSkin revo2 and pricing is around $40.

The iSkin revo2 encases the iPhone 3G in a protective silicone material, according to iSkin. This is designed to protect your mobile from dings and dirt. Joining this layer of protection is antimicrobial product protection as well as a face shield which is transparent and detachable.

When Apple announced the iPhone 3G this week it was a given that cases and accessories would be deluging us in the next few weeks. One of the things that most iPhone 3G buyers cone July 11 will be looking to buy at the same time will be a case to protect their shiny new phone.

To that end Belkin has announced a complete line of nine cases specifically designed for the iPhone 3G. The cases are supposed to protect the iPhone 3G and add looks to the device at the same time. The Belkin line includes silicone cases, arm band cases and polycarbonate cases in multiple colors, patterns and styles.