Here is some info on Skate Detroit which is being held at the Detroit Figure Skating Club in Bloomfield Hills, MI July 19 - July 23/2011. Bloomfield Hills is about 25 miles north of Detroit.
I've seen a few names on other forums of senior competitors: Men - Keegan Messing. Ladies - Christina Gao, Becky Bereswell, Alexe Gilles.
From what I've been told this is a huge competition with 3 rinks in use for most of the days. Admission is free.
If I read of any other competitors, I'll post the info here.