Works for iPhone 3GS. Don't run it on Vista or 7 -- works great from XP.<p>Literally takes seconds to jailbreak -- much faster than previous generations of JB (like PwnageTool, RedSn0w, or QuickPWN).<p>Blog post from the developer "geohot": <a href="http://iphonejtag.blogspot.com/" rel="nofollow">http://iphonejtag.blogspot.com/</a>