Lilly: Hi everyone,
I have found this thread interesting and had a couple of questions of my own. I use a MacBook which is using 10.5.4. Am I able to jailbreak using this version or does it need to be older? Also I have just updated to 2.2.1 on my phone. Am I able to jailbreak from there or do I need to go back to an earlier version? Like other I suppose I am apprehensive and as much as I like to thnk I am quite technical in my thinking, at times like this I realise I am really not!
It doesn't matter what version you're running on your phone as you're not really "upgrading" when you jailbreak. You're wiping, and loading cracked firmware. So you'll be fine to do it with your current setup.