I like it mate. Good grid layout, good colourscheme, all the information presented well, varying sizes which helps too.
The only thing I'd look at experimenting with is the green circles. I'd possibly rotate them to the right a little and move them up, to fill the large black space a little more and to make the eMail part a little less crampt. Nice business card though.
Quick question, when printed [if yours is] is the small text more readible? As I've thought about adding small text on another design, but it was very hard to read on screen.