Important article done by Pedro Sanchez:
I successfully host JAILBREAKME.COM on my own local server, without any internet connection needed.
I tested my self in my own Iphone 3gs, and a Iphone 4g (versions lowers than 4.0.2).
I post the step by step here:
Read more here ... http://www.desbloqueomoviles.com/?q=node/97