Don't screw around.
This is the product, especially for the novice:
http://www.bestbuy.com/site/olspage.jsp?skuId=6304082&type=product&id=1074787298555
Sets up wireless network for you. Dummy-proof software holds your hand through the whole process.
13 digit, WI-FI encryption. No one can steal your signal or "drive-by."
You and can surf at the highest cable/DSL speed your processor will allow. Works great with Vista, if you're running Vista. We have one computer on Vista, one off.
This router has the speed booster, too. No dead spots in the house.
I highly recommend. You will finder cheaper routers. But, you won't find a better one for the price.
Seriously.
Here is the same router for $50. No booster, but doesn't matter unless you're doing high-graphic gaming.
http://www.bestbuy.com/site/olspage.jsp?skuId=5250774&type=product&id=1051384663529
EDIT: I just noticed that this router was on Frank's customer review site.