Over on TechCrunch.com (CrunchGear’s mothership), Michael Arrington is calling Facebook “the single best iPhone-customized website to date…”

“The site uses javascript to avoid page refreshes, although there is still some lag in moving around the site (this is an iPhone issue). The main navigation tabs – Home, Profile, Friends and Inbox – are at the top of the site. Click on any person and see their profile, wall or photos via a horizontally scrolling interface.”

It’s not been launched officially yet so there are still a few quirks but Arrington believes it to be the site to beat on the iPhone for now.

Facebook + iPhone = UltraCool [TechCrunch]