All, Cringley let slip in his column yesterday that Gmail runs on Xserves. The exact quote is "...especially since Gmail, itself, runs on Apple xServe 1u boxes." Is this true, or is he simply blowing hot air? I always thought that google ran their entire infrastructure on Linux (Debian?) with commodity x86 hardware. Does it make sense for them to be running xserves for gmail? If so, are they using OS X, or a PPC Linux variant, or something more exotic (NetBSD--unlikely, but?) Can anyone shed any light? This is the first I've heard of this.