Dear Auntie Lazyweb,
- Bluetooth enabled (to use with a mobile phone)
- Decent battery life
- It absolutely, utterly must have a mini-USB port for charging off my laptop (i.e., no bothersome extra power adapters)
I'm flexible on the rest (i.e., amazing precision isn't a big deal if the thing is the size of a lighter, etc., etc.), but those three are the ones I care about the most.
Your Loving Nephew,