A bit late to thius thread, but an auto-answer feature when using headphones would be a real benefit for me.
When riding my motorbike, I have my Z5 Compact hooked up to my motorcycle intercom system to provide navigation (via GoogleMaps), music (via radio or downloads) and the last part of the jigsaw (which I used to have with an old Nokia 6230) was the ability to auto answer incoming calls after 2 rings.
