Or just grab the Odin-flashable package from Intratech's XDA thread.
This is, of course, ONLY for the international GT-I9100. Users of the SGH-I777 won't be able to use this until Samsung releases kernel source (which they are legally required to). Users of the Sprint GS2 won't benefit much from this, and users of the Skyrocket or T-Mobile T989 get nothing from this.
------------------ *disclaimer* I am not now, nor have I ever been, an employee of Best Buy, Geek Squad, nor of any of their affiliate, parent, or subsidiary companies.