These things tend not to survive long in the wild, but it's your $2, have fun: audio capture iPhone app DiscoRecorder apparently has a secret, and it's an Easter egg proxy server.
If you follow a rather rococo set of network config steps (detailed by 9to5Mac), make a recording, and rename it "PearSauce269.aac" (really? OK, sure, why not) then voila! Free tethering, regardless of your iPhone data plan (but that will still use up your data allocation).
Given that the "discovery" of
