An alternative to the Apple BT keyboard with a similar concept is the Logitech diNovo Edge. It's Bluetooth, thin, sleek, and black (as opposed to white).

For my n800, I actually use the Stowaway Ultraslim Keyboard a lot of people on here use. But the Logitech would work just as well.

As for the UBiQUiO (gawd I hate the lowercase i's), it appears to closely resemble this other Stowaway keyboard. IIRC, it's referred to as the Stowaway Sonoma and you have to do some fancy stuff with kbdd to get it to work (search these forums).

Question to you all:
Has anybody found a way to input ASCII characters/symbols when your BT keyboard is active? Since the onscreen keyboard goes away during BT keyboard usage, I have no idea how to access said symbols.