Hello everyone, and thank you for all the warm wishes and some not so warm,
It has been tweeted and on interview blogs that a 3.1.3 jailbreak will not be forthcoming....there are other updates coming out from Apple very soon and these are the updates that need working on.
If you all want to keep asking about a 3.1.3 jailbreak or even unlock then be my guest, but nothing is coming......I REPEAT, nothing is coming.
As for downgrading, YES, there are a lot of great and useful downgrade tools out there, but if you have updated to 3.1.3 and your Baseband is 05.12.01, then I am sorry to say that you are SOL at this time. the new Baseband was placed in the Apple firmware for one reason and one reason only....to screw evry unlocker out there on doing an unlock.
I wish that you all could have back the trusty 3.1.2 firmware and lesser Baseband, but this is not going to happen, just hang in there for the new 3.1.4, 3.2 or 4.0 firmware to arrive and all will be golden once again....
Any new updates on jailbreaks and/or unlocks as well as firmware coming out will be on twitter....follow and learn the news.