hey I dont know how many of you have seen this but Im working on getting the 3.1.2 downgrade without SHSH on file to permit this JB on ios4.
http://www.redmondpie.com/jailbreak-iphone-3gs-ios-4-new-bootrom-with-sn0wbreeze/
they say comex is just waiting for the 4.0.1 to come out to release an untethered JB however we will have to wait almost a month for that 4.0.1 I think Apple is out of control with their denyal process of the bugs in IOS4
http://www.redmondpie.com/jailbreak-iphone-3gs-ios-4-new-bootrom-with-sn0wbreeze/
they say comex is just waiting for the 4.0.1 to come out to release an untethered JB however we will have to wait almost a month for that 4.0.1 I think Apple is out of control with their denyal process of the bugs in IOS4