Like many of the Macintosh faithful, I watched Steve Jobs' keynote speech at MacWorld last week with anticipation, and I wasn't disappointed. The announcements about the new G5 Xserve and the beefed up Xserve RAID were just what I had been hoping for in the data center (see story). And if those new iPod Minis were just $50 cheaper, I'd have bought two by now. However, the most underplayed news, and yet the most interesting thing to emerge from the show in my view, was Apple's new Xgrid application. This software is aimed at scientific applications like gene sequencing, missile...