I've installed gigabit ethernet for my desktops and server, and a couple of my laptops have gb ports, too. Makes a big difference when shifting files around.

If you already have gb ethernet installed, here's a cheap and convenient way to add it to your laptop or any other computer with an available usb 2.0 port. Five bucks + shipping!

Here's the product description page.

I think the sale is on for a couple more days. I've bought stuff from these guys many times over the years, and they have always been quite reliable.