I recently picked up a N800 and I really like it. I upgraded the software to the 3.2007.10-7 version.
At first I had some trouble trying to get it to pair with my BT ThinkOutside Keyboard. I found out I had to NOT check the "Trusted" option in the N800 when initially pairing to get it to see the keyboard. After the pairing was successful I was able to go back into the BT Device settings in the N800 and set the keyboard as trusted.
Once setup the BT TO Keyboard works great with the N800.