This was a lucky shot. I'd been indoors working on something else, and stepped out to stretch my legs. I looked down and saw a brilliantly colored fly. On second glance it was a bee. I dashed inside and grabbed the camera (which had, as I recall) the 55 Macro lens on it. I snapped about a dozens shots before she flew away.
I've managed to ID her to the Halictid family of bees, but the specific species is one of about four and I'm not sure which she is.