I have been absolutely tearing my hair out trying to get files to my N800 from my Mac (OS X 10.4). I followed the advice of baddog and IT WORKS!!! It's all about the OBEX, baby.

So, here's the definitive for getting files FROM a Mac TO your N800 via Bluetooth. (It doesn't work in reverse, but I can cope with that.)

1. Open a browser window on your N800 and go to http://www.mulliner.org/nokia770/ and select the maemo 3.0/bora repository settings install link. (The address is http://www.mulliner.org/nokia770/mul...g_bora.install) This will install Mulliner's software catalog into your N800's Application Manager.

2. In Application Manager, select Browse installable applications. Scroll the list until you find sobexsvr.

3. Install it!

You'll now be able to push files from your Mac to your N800 via Bluetooth (presuming you've set up the N800 as a trusted device on your Mac). I had tried installing sobexsvr before but it just wouldn't do it. This method has worked for me.

Lucky.