Hey guys. I own a PowerMac G5 but for my anniversary my girlfriend got me a G4 Cube because she knew how much I loved 'em. I just found out that you need USB speakers.. lame! But I have a few quick questions.. 1. (Even though I don't have speakers) When I put an audio cd in the CUBE.. it recognizes it, but when I hit the play button on iTunes, the swirling beach-ball will just sit there. What's up with that? 2. Can I upgrade the processor and boost the memory up to 1GB? G4 Cube 450 MHz 512MB Memory 100 HDD Thanks guys!