How-to: set up dual-band WiFi (and juice your downloads)
http://www.engadget.com/2009/05/01/how-to-set-up-dual-band-wifi-and-juice-your-downloads/

How-to: set up dual-band WiFi (and juice your downloads)

Want.

Let's come right out with it -- you should be running a dual-band 2.4 and 5GHz WiFi network. Why? Because the 2.4GHz spectrum is cluttered with everything from other networks to Bluetooth to cordless phones and microwaves, and all that RF interference slows everything down, making file transfers interminable and HD streaming nearly impossible. On the other hand, 5GHz 802.11n is clean and incredibly fast -- we're talking almost hardwire fast. But you can't just move up to 5GHz without leaving your phones and other legacy devices behind, so you've got to keep 2.4 around as well -- which is really easy if you've got a simultaneous dual-band router like Apple's new Airport Extreme or something like the D-Link DIR-825, and only slightly harder if you don't. And, as luck would have it, Apple just sent us a new AEBS to play with, so we thought we'd show you how to configure both kinds of setups. We promise you'll thank us.

Let's come right out with it -- you should be running a dual-band 2.4 and 5GHz WiFi network.