i'd argue that they are coming due this month. they've typically been refreshed in january and june, and since the iBs didn't get their usual spring refresh it seems as if a significant refresh is in the works possibly for both models. it'd also be pretty suicidal for Apple to stop developing their machines and pushing for "significant" upgrades, particularly after the intel announcement. if they don't then it's more likely that if their PPC sales take it a hit, it'll be more damaging than if they had continued to push the platform. just because Apple is switching to x86 doesn't mean they won't keep developing OS X in tandem w/ the PPC platform. it's like saying that since MS released XP that security, browser, aaplication, and system updates wouldn't have been developed for Win 98/Me. you could likely buy a PPC Mac on the last day they're available and have all the support (OS patches and updates) you'd need for the life of the machine. windows 98, released in june of 98, officially had it's support dropped by MS in june of 2003. 5 years of offical support from the OS maker. if Apple does this for Mac users that means in 2007 when the powermacs r replaced u could put the 5 year marker starting point there, meaning support thru 2012. if u don't upgrade your system by then, you're likely a tinkerer who just likes to email and surf and u don't really care or even know about how to upgrade your OS. simply put, support at that point would be moot w/ such a user.