I have a tip that is great for people with smart phones that are either only edge capable or on an edge only network. Using Opera Mini browser on my Nokia E71 and N95 on T-mobiles network I can browse the web faster than using AT&T or Sprints 3G networks, I've tested it. The pages load about 3 seconds faster than on the 3G networks. I have found that this is not well known among T-mobile users that I know.