I went home from college for the weekend last week, and was totally floored by the fact that my dual 533 Mhz digital audio G4 tower ran OS X markedly better than my 667 DVI ti book, which is no slouch, and as far as I had used it at school, never had any speed issues, even when running photoshop, or imovie. But when I got home and actually used the old dualie, everything just seemed faster, more fluid and responsive. They have the same bus speeds, the dual 533 does have 384 MB RAM whereas the tibook has 256. The tibook has 1 MB L3 cache that the tower doesn't, and the tower still has the stock geforce 2 MX video card in it. Anyway, I was wondering if anyone out there with a 1 Ghz tibook (or the 17 albook if its shipped by now) has any comparisons to either the 500 mhz or 533 dualies, to see how the latest portables stack up against some of the older g4s out there. I really wasn't aware of how much the dual processors made a difference until this, and i was floored that such an old machine (well comparitvely, its 2 years) dominated a six month old machine.