I have been considering Leopard on my 800mhz TiBook and my wife's dual 500 G4. The dual 500 has a PCI 32mb radeon 7000 in it and 1.25 gigs of ram. The TiBook has 768mb of ram, though I allready plan to max it at 1 gig. I also have a faster HD for it. I like the idea of time machine. Has anybody with similar hardware done it? What are your thoughts / imperssions?