Dev-Team Blog
That is the best place for all your JB needs. iClarified.com has easy walkthroughs for those not in the know, but the newest version of redsn0w is pritty idiot proof. Also, be aware that the current iOS 5 jailbreaks are
tethered jailbreaks; so if your phone dies or you power it off you'll have to 'just boot tethered' it to boot it and get your jailbroken stuff to work.
Mine is jailbroken. No issues. Love it, etc, etc.