In case you are out of the loop -
Ambercon 2011 is also known as Ambercon US 22. Ambercon 2011 is chaired by Joe Saul and held April 14th-17th, 2011 outside Detroit, Michigan. It is held in the in the Embassy Suites, Livonia, Michigan.
More information, as well as registration and game submission, is available here - http://ambercon.com/
If you have never been to an Ambercon, I highly recommend giving it try. The games are top notch and the people are great, too.