Check out -- http://www.touchatag.com/ http://www.touchatag.com/ http://en.wikipedia.org/wiki/Touchatag http://en.wikipedia.org/wiki/Touchatag I got one of th

Check out -- http://www.touchatag.com/ http://www.touchatag.com/ http://en.wikipedia.org/wiki/Touchatag http://en.wikipedia.org/wiki/Touchatag I got one of their readers for free at a conference. Can do pretty much everything you're describing I believe.