As a Mathematica user(MUHAHAHA, that's what's so good about having a parent work at a research institution. MUHAHAHAHA!!!), the release of Mathematica 7 is an exciting news.
Mathematica has becoming Photoshop for math. In the future I will edit photos by typing equations instead of mouse gestures. Love this thing.
Can't wait to get my hands on it...
While it is good. I can't help to notice Mathematica 7 is way bloated and a released too soon. Consider Mathematica 6 was released only a year ago. Does anyone really need speech output system for Mathematica? lol.

I can get my own copy if I gold USAMTS. The last problem for this round is quite hard consider I use the naive and obvious sum up all area and divide method. Still searching for nice identities.