Grindr is an app for iphone and blackberry that essentially shows up other users by who is nearest to you (located by GPS). It's kinda ok, but it's pretty rare you'll get anything on there other than a few different things.
1. Old guys hitting on really young guys
2. Really lecherous people looking for various forms of NSA sex (Had one message along the lines of 'want to meet for fucking, dirty, piss, shit, filthy, handcuffs, take advantage of me if you get me drunk enough, chemed up, filthy disgusting fuck fest' I was like ... o_o -block-
3. Conversations like: Hi, Hi, How are you?, Ok you?, Yeah I'm ok -silence-
It needs a search function XD