Alright, so if I were to use an iMac G5 (second to last revision, just before they got the iSight camera built in) as a main/secondary PC (Macbook/Air would be the other) how long does it have left? I mean, it can only go to Leopard so how soon until Apple stops updating iTunes etc. for it. Basically I want to have a laptop as my main computer but I want an always-on computer for Apple TV etc. And I may have a chance to scoop an iMac up for nothing. I don't speed is a huge deal since I just browse the web/email/iTunes anyway. Thoughts?