The site simple says this:
October 26 is coming fast. This is your chance to be one of the first Windows 8 Apps in the new Windows Store. Submit your app and get feedback from developers like you. Review other apps and ask and answer questions on Stack Overflow. Unlock achievements for participating and get a piece of over $15,000 in Windows 8 prizes for the best apps and most helpful reviewers.
Develop an app for your chance at the Grand Prize: $5000 cash, promotion for your app in MSDN Flash, an interview on Microsoft DevRadio, and more. Runners-up can also win a $500 cash prize, a tablet running Windows RT or a copy of Windows 8. Read about the Developer Contest
You don’t have to develop an app to win. Vote for apps, leave feedback, ask and answer questions on Stack Overflow, and you’ll be eligible for prizes including tablets running Windows RT, copies of Windows 8, and a special limited-edition Stack Overflow t-shirt. Read about the Reviewer Contest
At the end of the contest, a panel of Microsoft and Stack Exchange judges will select two Grand Prize Apps from among the top-voted apps. The Grand Prize winners will receive:
$5,000 Cash Grand Prize
Feature in MSDN Flash and Microsoft’s DevRadio
Promotion in Microsoft’s User Community
- MSDN Flash is Microsoft’s premier technical newsletter that reaches 600,000 developers every week. Your app will be written up and reviewed here!
- DevRadio brings you the latest in software development news. You will have the chance be interviewed and be able to pitch your app to about 10,000 listeners!
- Microsoft User Community is a network of technology professionals and enthusiasts that reaches over 45,000 people on Facebook and Twitter. Your app will be shared with developers and consumers alike!