You can send files from one device to the other through BT via the file manager. Set the other device with BT on and visible, and it will show a popup where you can chose to open the file with an application or save it etc. It works more or less the same as when you send pictures and the like between mobile phones through BT. I haven't measured the rate, but as the N800 uses BT 2.0 it at least has the potential to be much faster than the typical BT 1.1/1.2 which is the most common in use on phones currently.