Hi! I need to get a new MacBook for the bar exam in July (the exam software doesn't run on PPC Macs), but I've heard there's a possibility of a hardware update or refresh at WWDC in a couple weeks. What are the chances of that? I'd like to buy ASAP so I can get it all set up before my bar courses start, but I'm willing to wait a couple weeks for a better machine. So what do you all think? Buy now or wait til WWDC? Thanks!