I just did an update/upgrade and now Posde is correct the keyboard does work, although there are a few of comments:
1. Speed - general fast typing is OK but when there is a double letter there is an issue - type 'hello' and it appears as 'helol'. at first I thought it was me but i tried it a few times and other words, issue = isues. perhaps there is a time value associated with repeat commands or inputs?
2. Non-Letter/number keys - Backspace, Space, shift, caps lock, Tab do not seem to work from the physical keyboard
3. From the on-screen keyboard, if you hit shift you cannot get back to regular characters, every input will be upper case. pressing shift again does not cancel it.
4. Caps Lock on the on-screen keyboard doesn't work.
This was all done on a Dell Latitude D620 with Ubuntu 9.10 netbook edition using Firefox
I will continue testing within other areas but this morning I was using the computing screen, mostly.