This may not be worthy, but one of the best apps i have ever found is by far Romeo. This handy little (free) Bluetooth app creates a whole new world on your Bluetooth-enabled mobile phone. AppleScripters will love the functionality -- if you can do it with AppleScript, you can do it with Romeo. The proximity settings still need some work, but the app is the envy of every Mac Addict i know.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20040222031602615