We did some digging, and from what we can tell, G.Skill's correct in claiming that it's new DDR3 kit is the fastest around, so long as we put the CAS Latency (CL) setting front and center.
The new kit, which is part of G.Skill's Pi series and "specially tuned for Intel Lynnfield Core i7 870, 860 processors," comes rated at DDR3-2200 with 7-10-10-10 timings at 1.65V. It's available in 4GB (2x2GB) form, but is it really the overall fastest?
That's a tough one to answer. A quick peek on Newegg shows one other DDR3-2200 memory kit, this one from Super Talent. It comes rated at 8-8-8-24, so we're willing to give G.Skill's kit the slight edge, at least on paper.
G.Skill says its new modules will be available through collaborated distribution partners "immediately with affordable price." As of this writing we weren't able to track down a kit online.