Those who have been waiting patiently for the iPhone Dev Team to release a Windows version of their iPhone 2.1 jailbreak will be happy to know that QuickPwn 2.1 iPhone jailbreak is out now.

Similar to its Mac OS X counterpart, it won’t unlock the 3G iPhone and doesn’t support the 2G iPod Touch. While the full Pwnage tool for firmware 2.1 and Windows is still yet to be released, those looking for a jailbreak tool for Windows can use this QuickPwn app for the time being. So if you're still up to the task of jailbreaking, you can download the QuickPwn 2.1 iPhone jailbreak for Windows now.

[source]