AWS is a finalist in two categories of the Crunchies awards, Best Enterprise and Best Overall.
In addition to that, AWS-powered applications from Animoto and SlideRocket are candidates for Best Design; eBuddy and Fotonauts are up for Best International; DropBox for Best New Startup of 2008; and Twitter (competing with AWS) for Best Overall. GoodGuide is a finalist in the Most Likely To Make The World A Better Place category, as is Akoha. Meebo is a candidate for Best Application.
If you could take the time to vote that would be great! Here are some direct links to make it really easy:
PS - If I missed any AWS-powered applications, drop me a note and I'll update this post!