If you're open to something more road-ish this could work.
http://www.competitivecyclist.com/za...ODUCT.ID=10924
Here's a picture of my On One Il Pompino when I first built it up.
The newer version has slightly longer chainstays to fit bigger tires. 35mm is the recommended max I think. The glow in the dark neon paint was limited edition.
With wide flat or riser bars and V-brakes it would be a pretty idea urban knockaround bike if you're open to the singlespeed thing. It takes a 120mm rear wheel (standard track), so you can run it fixed gear easily too. Hard to see, but there's a gusset on the downtube. It has braze-ons for a rear rack and fenders. I've done some mountain bike trails on it, and I race cross in the singlespeed category on it. One of my favorite bikes, and cheap to boot.