At the PDC, I bought a bluetooth "Freedom" keyboard, unaware that at the time there were no drivers available for the Tablet PC. Although Freedom eventually released a driver, the keyboard is unacceptable for typing.
I then purchased a wireless keyboard from Motion (reduced to \$89). It arrived promptly but I could not get it to install correctly in Bluetooth (the exchange of passkeys did not work). After a few calls with Motion tech support, they sent me a replacement. It installed flawlessly and I am writing this entry with it. It seems to be quite a nice keyboard -- I would say it's about average laptop size and has very nice key motion with good audio feedback. Yeah, I think I quite like it.