Finally uploaded Translucence theme to wordpress.org. It is currently being reviewed and will hopefully be available soon.
Translucence is based on Twentyten, adding support for setting the opacity of widget areas and various other options similar to those found in Shadowbox. See:
Just uploaded a new version of ShadowBox to wordpress.org. This new version contains many of the innovations I developed for Translucence including opacity settings for most layout areas of the blog. As well, I’ve improved the theme options model so that it is much more what-you-see-is-what-you-get (WYSIWYG). See:
Hope to release Translucence soon.