Mobile Stew

I'm loving my Xbox360 headset.  I've started using it to make 'phone calls' to my friends. Although it can be a bit fiddly making a call as I have to be in front of my TV to make or accept a call, I love the fact that once the call is created I can wander around the house effectively handsfree (I tuck the controller in my pocket) as the range of the wireless controller is sufficient for my whole flat.

What would be great if some smart Alec came up with a "caller id" module that plugged into the memory card slot that would display who was calling and would allow me to accept a call.  Now that would be amazing. 

Hopefully there are some reading this post ...