Web Matrix and Theming

In case you missed it, Nikhil has posted a screenshot of the new Web Matrix.  Looks pretty cool, but I'm wondering about the theming comment.  Now, is web matrix simply taking advantage of the built in windows theme, or are they doing something magical to give their app a new theme. 

My guess is the old watercolor theme from some of the Whistler builds makes a comeback in Longhorn.  If you are curious, you can download a hacked together theme from TweakXP.  Note, the copy from TweakXP isn't for the weak of heart.  It involves replacing your uxtheme.dll in recover mode with a version hacked out to enable custom themes...