I got to work this morning and docked my iPhone and tethering wouldn't start (Stealth 6.0 IPCC). I went into Cydia and downloaded MyWi (no rock) and I can get my phone working as a wifi hotspot, I can't over USB. Any suggestions? Yesterday I updated Cydia, SBSettings and Winterboard. I'm also still on 3.1.2, wanna see if anyone gets jacked first on 4.0 with hacked tethering before I upgrade.