I'm a big fan of the fancybox plugin. It is a very flexible JQuery lightbox plugin that has met every project requirement I've ever needed a lightbox for. It also has a great library of events attached to it that have fit most of the User Interfaces I've ever used it in.
The fancybox plugin has matured into version 2 and been re-badged slightly as part of the fancyApps suite.
It has to be one of my top ten recommended JQuery plugins.
I've since found that the new version of fancybox (2) has had a license change. Version 1 is licensed under both MIT and GPL licenses (http://docs.jquery.com/Licensing
) but version 2 is 'Creative Commons Attribution-NonCommercial 3.0'
and requires an $89.00 fee for commercial use, as discussed here in a Google Group: http://groups.google.com/group/fancybox/browse_thread/thread/fc4467bf0bf3ef6d/3edff176327fed35?lnk=gst&q=license#3edff176327fed35