Bluetooth

The tablets have a built-in Bluetooth radio that allows you to do thinks like tether to a cellphone for a data connection, transfer files between devices, and connect input devices.

Networking
There are two Bluetooth networking protocols. The first, DUN, is well-supported in Maemo and is the recommended method for tethering to a cellular device for data. The second, PAN, does not have official support, but is well-supported by the community. PAN is faster and more versatile, but supported by far fewer devices than DUN.

Dial-Up Networking
DUN is the primary method for tethering to cellular devices for data. It is easy to set up and easy to use, but slower than PAN in many cases.

Personal Area Network
PAN is faster and more versatile than DUN, though supported by far fewer devices, and not officially supported in Maemo, but support is provided by the community package maemo-pan. PAN is particularly useful for setting up Bluetooth networks between your computer and your tablet.

Input devices
Input devices are probably the most common use of Bluetooth. Keyboards are what most people will use, but Bluetooth mice are also an option, as well as interesting accessories like Wiimotes.

Keyboards
Bluetooth keyboards will work out-of-the-box without only a little setup.

Mice
Bluetooth mice are more problematic, as, by default, the mouse pointer is invisible in Maemo, but they can be used with just a little configuration.