Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
If you live near a university, you might pop by their library or some other common place on campus. My university' campus-wide wifi does not require a password or student ID. I can't speak for other schools. Using Speakeasy's download/upload, I have 90Mbs down and 100Mbs upload speeds using the campus wifi.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.