WinPwn will be a full featured application that "pwns" your iPhone/iTouch to allow unsigned IPSW's as well as creating your own custom IPSW.
Ok so i know i missed the weekend deadline but i have been working over time with some beta testers to get all the bugs worked out so we have a smooth launch. It's actually fairly complex since windows doesn't have native HFSX support and apple doesn't open the source code for hdiutil or any of the hfsx utils. So i thought i would try and cheer people up with another quick screen shot. Release will hopefully be very soon. I will post an exact time when i'm 100% sure
cnw has released the screenshots below of the progress on WinPwn.