All the tools that he needs are right here:
http://ih8sn0w.com/index.php/welcome.snow
I would start off with f0recast that will tell you what you need. If your on baseband 5.12.01 your sim unlock solution isn't gonna happen.
If you want to wear your F5 key out go to limera1n.com and wait till the 30th, it's supposed to be the expected release date for geohots latest unlock and jailbreak. This is rumored to be an untethered jailbreak.....yiipppeeee!
Spirit is also supposed to be releasing a jailbreak which would allow you to use your devices browser only to free your device...as orange kid stated, I'm waiting for this o e myself!