Like many people my phone is most of the time in silent/vibrate mode. I was wondering if there's a way to assign different vibration patterns for different notifications, just like we do for ringtones and alerts with sounds. Maybe there's an app that allows us to do that? I couldn't find anything yet.
Using the Notification plug-in for Locale, you can set separate vibrate patterns for different conditions.
Vibromaker is has pre-defined patterns.
Llama lets you create custom vibrate patterns for a variety of simple or complex events including location, either by typing in the pause,pulse,pause,pulse... numbers, or tapping out the pattern on a button
(Llama is free, funded by donations)