I desperately need to be able to tether to my macbook and I was holding off on the iOS 4 upgrade. I had tried it without jailbreak just to see what the OS was about. I quickly had to go back to 3.1.2 + blackra1n + MyWi so I could once again tether. I soon missed the niceties of 4.0.
So I figured I would give it a go and try to find a solution. I did! I took my 3.1.2 + blackra1n JB phone (old bootrom + 5.13.04). I then used Pwnage Tool to upgrade to 4.0 jailbroken. I simply went through Cydia and picked up PDANet and lo and behold it works perfect! This won't be a solution for your XBOX or multiple devices or iPad. But it works great for a single laptop. USB and Wifi tethering are both working.
So I figured I would give it a go and try to find a solution. I did! I took my 3.1.2 + blackra1n JB phone (old bootrom + 5.13.04). I then used Pwnage Tool to upgrade to 4.0 jailbroken. I simply went through Cydia and picked up PDANet and lo and behold it works perfect! This won't be a solution for your XBOX or multiple devices or iPad. But it works great for a single laptop. USB and Wifi tethering are both working.