Nokia 870 spyshot

So we’ve got some rumblings about the Nokia 330, and now there is also talk concerning the Nokia 870 Web Tablet that will replace the Nokia 770. There isn’t really much information that can be gleaned from the rather blurry spyshot on the right, but little birds has whispered that the 870 Web Tablet will feature a tiny webcam as well as VoIP functions. Hopefully Nokia won’t implement its infamous sidetalking feature that plagued the initial N-Gage. Does anyone care to speculate what the small black knob on the upper left hand corner is?