OS X Password Assistant

Create random passwords using Keychain's built in dialog box, but stand alone.

http://www.codepoetry.net/products/passwordassistant

Backup file to phone via Bluetooth Object Push Automater action

It's possible to make an Automator action that takes a file and sends it to a mobile using Bluetooth.

http://www.macosxhints.com/article.php?story=20071010200518755

points to this file which can be loaded into Automator (open Automator and on the file mene, choose Import Action...)

http://geekmuse.googlepages.com/BlueActionMove.action.zip

Unfortunately the phone (Sony Ericsson W880i asks for confirmation.

However, it is possible to just run this automator action and back up files wirelessly. I'm using this with a TrueCrypt volume which holds passwords, so it can be easily backed up.

Somewhere I remember having a program that would detect a bluetooth device coming in range and would run a script.