So my dad, Chuck Pike in Charlotte NC, is an avid, and has become a notable, street photographer in Downtown Charlotte. I think I got my love of the art from him, although I would say our personal styles are actually quite distinct from eachother. But that's not the point of this entry - just a little background.
For me, street photography is theatre. The photos become little vignettes, cinema, where the viewer gets to build their own story from the image. So I like to catch people in the midst of doing things, unposed and unaware of the camera. Voyerism? Yeah, maybe. But is it a rich source of material? Absolutely. And it's accessible to most of us today.
Well, yeah. With camera phones in pockets you don't have to have professional camera equipment to capture good street photos. The best cameras for street pics are unobtrusive. Small. And use a wide angle lens. Which just about describes every smart phone on the market.
Need examples? Go to Google+ and check out the street photography community there. It's huge and has lots of great examples. Decide what you like and what you don't, and try to grab shots that get your creative juices flowing. And you'll have more than just a new pokemon in your phone.