- Lightbox Gone Wild: this is a nice solution based on Lightbox and Prototype but a bit heavy weight due to the inclusion of prototype.js. If you haven’t seen the original lightbox effect check it out!
- SubModal: looks like it was started from scratch and is lightweight.
I’m leaning towards subModal right now since Lightbox uses prototype.js which adds 48K to the first page view. We serve around 150,000 unique visitors per day so adding prototype would result in an additional 150 * 48K = 7GB of bandwidth usage per day (we’re not currently running mod_gzip).