similar theme to…

I do not know of one, it would not be to hard to recreate, post images and overlayed titles in the index loop opening the single.php, the fade out on mouseover on the image is not to hard.

If you get stuck this one of mine may help, it is quite an old effort a year old and when I started playing with themes, I would not likely do it the same now!

About the theme:
http://digitalraindrops.net/2010/02/cms-portfolio-theme/

Preview:
http://www.digitalraindrops.net/demo/wordpress/portfolio/

Might make a nice twenty ten child theme project!

HTH

David