I should add that I got these:

http://www.linksys.com/products/product.asp?grid=22&prid=415

http://www.linksys.com/products/product.asp?grid=22&prid=435

For the second one, make sure you get the version 2 or later. The original version is said to have some problems, but the version 2 has absolutely no problems.

These items were incredibly easy to set up. The instructions actually make it seem a tad bit harder. They make it seem like you have to change settings, but really I don't think I changed a single default setting. It's a step tougher than plug and play, but not much more

So now I'm getting great transfer rates with a wireless connection through a wall, set of stairs, the second floor, and a couple doors! It's great!