I suppose it's a Vista theme for GNOME. Try searching GNOME-Look.org for the same. I'll try doing it too...
Here's a Vista theme fro gnome-look.org:
LiNsta 3 (Linux is Not Vista) GNOME-Look.org

Beryl Vista Theme:
Beryl-project.org


Also try this:
Zooomr Photo Sharing :: Photos from teen
Vista + Ubuntu = Vubuntu « Teenage tantrums.

U can even try some cool Mac themes along with the uber cool mac taskbar.