You should be able to use Bluetooth file transfer.

Pair the n800 with the Playbook, open file manager, select file(s) and send via bluetooth to the Playbook.

Or you can try this:
http://talk.maemo.org/showpost.php?p...44&postcount=7
And give the web server running on your n800 access to the files. You can then connect the Playbook to the n800 (acting as a WAP) and download the files through a web browser.