One of the most popular charitable causes for companies to donate money to is cancer research. Belkin has announced new cases for the iPod touch that are being sold and part of the proceeds will be given to help find a cure for breast cancer.

Two cases are available; one is called the DualFit for the Cure and sells for $29.99. The case can fit on a users arm and has a clear screen protector. The material is reflective for nighttime use. The case also has a key pocket.

We’ve seen a number of waterproof solutions that allow you to take your iPod safely on the beach or in the shower but the Icebar V2 combination case may be the best one we’ve seen yet (and the most expensive). The case provides a waterproof housing for you iPod nano and built-in waterproof speakers for places where it’s inconvenient to use headphones.

The case does have a port for headphones if you’d rather keep your tunes personal, and also has a click-wheel membrane to give complete control of the iPod through the case. The body is made of a shatter-proof polycarbonate which allows you to easily see the iPod display, but just be case the case is shatterproof doesn’t mean the iPod you put inside is.

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 …