I’m running FCP 4.5HD on my ibook G4 1.3Mhz with 512 MB RAM with no prob, I can capture via firewire, preview my projects on my TV. I can also run Shake and After Effects (not at the same time obviously) but it runs ok and I’m used to wotk with really powerful PCs at the office (Dual Xeons) and I don’t see that huge difference.
Dan.