Follow these steps to get invited to an App Excellence lab:

  1. Create a really great Windows 8 Metro style app (or game) immediately.  Get it ready as if you were submitting to the store.
  2. If you know your local DPE evangelists (maybe because you attended a Windows camp training), get in touch with them and ask them to nominate your app for a lab.
  3. If you don’t know your local evangelist, then email the following information to win8aefb@microsoft.com:
    1. Your name
    2. City & country where you are located
    3. Brief description for your app (no binary,  screenshot is optional, but only send if the screenshot is public, non-confidential stuff )
    4. Description of how you have followed the great UX guidelines we have at the design section in the Windows Dev Center
    5. Wait for our response letting you know where the closest app excellence lab will be and how to get in touch with the right evangelist to nominate you.

Hopefully, there will be a lab near you.  Right now, we have labs in 40+ countries and we may be adding more.

 

I lifted this from Jaime Rodriguez but I've been asked to help with the App Excellence Lab experience as well. Maybe I will see you in the lab :)

Reference:

http://blogs.msdn.com/b/jaimer/archive/2012/04/19/wanted-great-windows-8-metro-style-apps.aspx