I've just posted a new poll on your personal Mac purchase plans. Basically, with what we know now (not much, as usual), which Mac do you plan to purchase next for personal use? For each model, you can choose the currently-shipping version, or the we-know-they're-coming-someday next revision to that model. There's also an option for an as-of-yet unannounced Mac model -- something like the Mythical Mid-range Mac Minitower, for instance.
Personally, I keep holding out hope for the Minitower, but I don't think that will come to pass, so it'll probably be a next-revision iMac for the kids.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20080913200927189