Okay thanks. Any thread or info on weather I need the dual band? I've got an Express "g" router now, but my Macbook has "n". All computers in the house have "n" except the G5 iMac, which sits next to the router.
Edit: I think I understand this "Dual Band" stuff. Essentially I set the Time capsule to "n" only, and plug in the airport express through ethernet as "b/g" and create my own "Dual Band" network?