In-public.com is a terrific showcase for contemporary street photography (via Consumptive).
Talking of street photography, I had run into this Henri Cartier bresson portfolio in mefi sometime back that I have been meaning to post for some time. (More Bresson portfolios here and here). I also think of Martin Parr as primarily a street photographer. And in spite of Bresson's disdain for him (He was famously disgusted when he heard that Parr has gotten admittance in Magnum), he has gone on to do incredibly well in Magnum. He has a unique eye that captures the ridiculous even in mundane circumstances.
But the street photographer that I really admire from the Bresson era is Andr? Kert?sz. (Some his works are displayed in Petrimoine Photographique and in Jane Corkin's). I find his images elegant and powerful in a very quiet way.