I got my iPhone last week, and I'm wondering about Jailbreak. I think SSH/FTP and some games might be useful. Can I really brick my phone if I install it? Also I have 1.1.1 firmware, do I need to downgrade to use Jailbreak? And do I still sync everything using iTunes but just ignore Apple firmware upgrades? Oh and also does Jailbreaking void the warranty in some way? Is it easy to go back to the original factory settings (non-jailbroken)? I just don't want to render my new $400 phone useless by screwing something up.