iPhone 3GS Jailbreak
That took a little longer than I expected, but it seems that the 3GS has been jailbroken. George Hotz (the original hacker who unlocked the iPhone) has created a Windows-only (Mac is coming soon,he claims) jailbreaking application for the iPhone 3GS.
It requires that you have the latest iTunes version installed and the 3.0 firmware, but it doesn’t free you from your current carrier.
As Hotz explains on his blog, you connect your iPhone to iTunes normally, then run his software "purplera1n", and follow the steps of clicking "make it ra1n", wait until reboot, then upon reboot, run Freeze (the purplera1n app).
He does warn you though that backing up the data is a good idea and also that this tool is in beta, so move forward at your own risk.
I don’t know, Jailbreaking sounds fun and all, and there are lots of free things out there for Jailbroken phones, but the constant upgrading, re-jailbreaking, of an iPhone to just stay current would probably get to me after a while… what do you think?