Looks like Geohot was being sarcastic when he said limera1n for Mac would be released in 7 years. The limera1n Mac download for iPhone 4 4.1/4.0/4.0.2/4.0, iPhone 3GS 4.1/4.0/4.0.2/4.0, iPod touch 3G 4.1/4.0/4.0.2/4.0, iPod touch 4G 4.1/4.0/4.0.2/4.0, and iPad 3.2.2 hardware was just released by Geohot. Simply click make it ra1n, put your device in DFU mode and the limera1n jailbreak will do its magic.