Hi, my name is not Fred and I'm a PC user. I'm very intrigued about Macs since buying and loving an iPad. Wanting to get more familiar with the Mac world, I just bid on and won a PowerBook on eBay. It is a 1.33 ghz G4 with OS X 10.5.8 and it has been Upgraded from 256 to 768 of RAM. Now, I'm not a very tech savvy guy, and I want to eventually buy a nice shiny new Mac one day soon, but until then, what limitations can I expect with this machine? I would like to get that new app store that everyones talking about, and be able to do most of the things I currently do on my PC on this Mac. I read that you need an Intel Processor to even install the app store, and I don't see where the processor in this PowerBook is an Intel, so if that is the case, can someone tell me what I can do to upgrade this? I don't like the way PCs constantly make themselves obsolete, and I would like to have a machine that can be upgraded for a feasible price, rather than buy a new PC every year or two... Anyway, thanks for any and all help.