I love how time machine will now backup over wireless, Plugging a hard drive into your airport extreme and using it to store your backups on a external USB hdd is just perfect. No more wires
However first Backup will take a few hours, but worth it
using this software, ( FREE)
This wireless base,
And any usb external hard drive. I personally use a Lacie 250 Lego Brick.
AND, if it doesnt work on the first backup attempt or your using a previouse drive with timemachine and installing this, then go here,
[original attachment deleted after 2 years]