Do you know when to buy a Mac, iPod, or iPhone? Here's help from Prez Art Gorski. He leads off with, "Don't you just hate it when you buy an Apple product and then they release a new, better version right after? The MacBuyer's Guide keeps track of Apple hardware updates and is a great guide to when you should buy a new Apple product."
So we look here and find info with recommendations such as "Don't buy: updates soon" — "Buy only if you need it: approaching the end of a cycle" — or "Buy now! Product just updated." You also notice the links to their categories of blogs and forums. Take a look, you may want to bookmark this.