Your answer is staring you in the face - it's firebug. If I leave firebug + Gmail open overnight, every few nights it wakes up in the morning eating having eaten all my ram.

Someone else in this thread mentions the use of bluetooth, but in a different capacity. My suggestion is to create a bluetooth button that a girl can say clip to her jeans, which vibrates when her phone rings in her purse. I proposed this to a few big city girls, and they thought it was a great idea.... Now where's my factory...

(I'll leave the jokes this idea sets up to people replying)