Making my dev site go live, but not all the links are updating...

We were developing a new site at omega.kellenberg.org.
We went to make it live today and replace "omega" with "www" in the URL.

Things are moving along. We've gone in and replaced every place where the former URL was, however we can't figure out where the data is stored for the WPMU/Upfront elements like buttons, text boxes, etc. which did not change.

It's also still looking for images that are at http://omega...

Where and how can I fix this?