When should I buy a new computer?

Did you finally decide you're going to buy a Mac
With every possible add-on?
Did you save up for a very long time?
Did you agonize over parting with all of these dollars at the store?

Did you then read that Apple announces it's new line of Mac Book Pros? Coming out next month?
Doh.

Here's a handy site that keeps tabs on when you should buy and when you should wait. It covers most Mac products including iPhones, iPods, and computers.