When Apple debuted the iPad, they also offered their own keyboard and allowed Bluetooth keyboards to connect. Fast-forward nearly a year later, and at CES, there was no shortage of manufacturers from around the world offering up a range of keyboards. One had a trackpad, but no, it doesn't work on iPad. One used rubbery membrane keys with a soft but kinda not-so-great-for-typing feel.
Unfortunately, TUAW doesn't have the manpower to review all of these, but hit up the gallery for a walking tour of some of the cases and keyboards we saw at CES.