Before I go defile myself with burgers and beer I wanted to jailbreak my iPhone 3GS for you all. The process was amazingly simple. Using a Windows netbook - it doesn't work under Windows 7 - I simply installed iTunes and ran purplera1n. It took a second to reboot then it rolled through recovery mode, rebooted, and an app called Freeze appeared. Freeze then installed Cydia and all was right with the world.