Comex, creator of the Spirit jailbreak, has released his source code to the public. Now other iOS jailbreak devs, can create their own jailbreak tools for iOS 3.1.3, using comex’s code. The exploit used is no good for iOS 4, in it’s current form. Comex has said he might be able to make it work, but has decided to focus on a new exploit.
Comex had this to say on Twitter:
This is painful. But. *sigh*
To preempt any questions: this is not a new jailbreak or anything useful to non-developers.
Comex has also posted the Spirit source code on Github.