I released the new version 4.0 of jQuery Colorbox today. Check it out 
Changelog:
4.0 (2011-04-17)
- CHANGE: Restructured settings page
- CHANGE: plugin again compatible to PHP4.
- CHANGE: Update of Colorbox library to version 1.3.16
- CHANGE: jQuery calls won’t break other JavaScript libraries like Prototype or Scriptaculous any more
- NEW: set width and height for Colorbox links once separate from the Colorbox setting for images
- NEW: inline HTML content can now be loaded in the Colorbox.
- NEW: Latvian translation by Uldis Jansons
- CHANGE: Modar Soos updated the Arabic translation
- CHANGE: Joao Netto updated the Portuguese translation
- CHANGE: Arkadiy Florinskiy updated the Russian translation
- CHANGE: made plugin compatible to the “smugmug” plugin.
- CHANGE: moved Colorbox CSS class add to style dropdown of TinyMCE