I'm in Brooklyn, ny and both veriZon and cablevision tell me that it'll take atleast a month before they wire my house (block full of new houses). Since my experience with NYC providers tells me that 1 month will turn into 4, I'm thinking of getting prepaid wireless broadband - what are my options? I have an AT&T cellphone and can go through them, but don't want to extend my contract or sign a new one