I actually bought the Panasonic GF3(with 14mm F2.5) with street photography in mind. I love the camera! It's small, weighs nothing and can you can easily take it with you without any inconvinience. If you buy the GF3 with 14-42mm it's even better for street photography.
It isn't as good as the D7000 but the best camera is the one you always have with you.