I put down my SATs - the 7th grade CTY ones, not the official high school ones. I figure that many applicants have perfect or near-perfect SATs, so I wouldn't stand out so much on that basis. I debated taking them off as tacky, but I figure that I've already posted a lot about my experiences on this board, while the test scores and such is new information.

Ultimately, I think experience matters more, but there's a whole other section on the app for "What have you built?" and another one for "What tools will you use?"