Here are some screenshots of it in action:
The project is currently labeled as 1.0 beta, because I assume there will be some issues.
Download the code from: CodePlex Page for LyteBox for SharePoint
Learn more about the original LyteBox code: http://www.dolem.com/lytebox/
Also, a hat tip to Pam Davis for her post that inspired this project: http://padavis.wordpress.com/2008/10/05/web-20-popup-using-lytebox-with-sharepoint/