I picked up this case from amazon, and I really like it:
http://www.amazon.com/Kobo-eReader-L...9032242&sr=8-1
It is not a hard case, but it seems to offer pretty good padding for average bumps and bruises. There is a link to a really amazing hard case in one of the other cover threads. The kobo snaps into it and it looks to be highly crush and impact resistant. Will copy it here if I can find it.
*edit*
Here is the link to the high impact case:
http://www.extremeinkjet.com/BookArm...karmorkobo.htm
Book Armor indeed!