Is it a good time to buy a computer? Prices are constantly changing and laptops are getting cheaper all the time.
My answer is: YES
Why? Because hardware manufacturers are actually lowering the prices on computers to help stimulate the economy (and so they PCs don't sit in warehouse shelves forever). For this reason, it's actually a really good time to buy a computer for a great price. On top of that, manufacturers are competing against super-low-priced netbooks that are running only $200-300!
Let's take Lenovo as one example. They already have their "value line" of laptops and traditionally the Thinkpad line has been considered the elite business-class notebooks. Even Lenovo is creating a Thinkpad X200 series that has a lower-cost Celeron processor in it.
Hope you find a great deal if you're looking for a PC. If you're looking for an Apple/ Mac, then leverage the fact that they're trying to clear out their old models of MacBooks (including the MacBook Air and the MacBook Pro).