You could probably get several very nice iPad cases for US$299, providing a different look for every day of the week. Or, if you need to be radically mobile and self-sufficient with your tablet computing, you might be interested in Voltaic Systems' new Spark case (http://www.voltaicsystems.com/spark) -- a solar-powered hard shell model with enough power to charge your iPad wherever the sun shines.
Voltaic designed the Spark (http://voltaicsystems.com/blog/thoughts-on-the-spark-design/) to pair neatly with Apple's tablet, with a 1:1 charge to use time ratio (a full charge for the iPad requires 10 hours of light on the panels). Rather than charging devices directly, the solar panels top off an included battery; it's designed to provide a full iPad charge, and sports both standard-power and high-power USB ports for multiple devices.
Obviously, a specialty case such as the Spark isn't for every iPad owner or usage model. For those who do need auxiliary power or extended off-the-grid operations, though -- field researchers, surveyors, engineers, park rangers, etc. -- it could be just the thing.
Voltaic (http://www.youtube.com/watch?v=C8hWx4Eddgw#ws)
Note: At 1130 grams/2½ lbs this thing is not light, better think about leaving it at the base camp when you climb Mt. Everest