too bad they don't make these anymore:
That's an LG HBM700, as you can see - LCD screen for caller ID, BUTTONS to dial with, and even a 2.5 port to connect a headset to. They just need to make an updated version of that w/ the newer BT 3.0.
This type of product came up in 2010 when a bunch of us were getting the original Galaxy Tabs and trying to figure out this use case of a mini-handset to take/make calls w/ a larger tablet.
Here's a link to the original XDA thread:
Also found this on Amazon: http://www.amazon.com/Satechi-Blueto...4871163&sr=1-1
Ultimately, I may just try a Sony LiveView watch to track incoming calls and just use the audio w/ my LG Tone headset.