here is a nice link..for the hardware which are compatible with Gnu/Linux..
have a look @ Linux advocate.org
The Hardware Buying Guide, a list of the best-supported hardware out there in 29 different categories, from Video Cards to Palm Organizers. Perfect for printing and taking to the store or yardsale! (Unless, of course, you're looking to buy a printer!)
if it was posted earlier plzz excuse..
any mod plzz delete this thread..
otherwise its worth having a look..