The iPad Smart Cover is nice, but it only covers the front of the device and leaves the back completely unprotected.
I was just reading an article about this and found that some companies make their own version of the Smart Cover, or make back-cover cases that are compatible with the Smart Cover.
If I had to pick one from the list I was looking at in the article below, it would be this one:
Belkin YourType Folio + Keyboard for The new iPad F5L114
In searching for the article I was reading, I also came across another one done the previous day, so here's both of them. The stampede is apparently in full swing!
New iPad accessories: XtremeMac, iLuv, M-Edge, Dr. Bott | Electronista
Accessories for iPad: Scosche, Belkin, Waterfield | Electronista