Portfolium is a grid based portfolio design from WP Shower. The theme works with all of the new features of WordPress 3.0 so you can easily add menus and change the background.
It boasts a classy blog template which makes articles easy to read so would is perfect for anyone who is looking to highlight photographs.
Portfolium is free to download from WP Shower. I recommend giving it a try :)
Portfolium: Info & Download | Demo