The good people at the journal Memoir (And) sent me a request some time ago about their contest. I should have notified you in May, but you still have until August 15 to get an entry together.
Here is the description. You can click on the website link above for more. Good luck!
The Memoir (and) Prize for Memoir in Prose and Poetry
The Memoir (and) Prize for Graphic Memoir
Four prizes awared up to $500.
Memoir (and) reading period for Spring+Summer 2010 (Issue 6): 5/1/09 –
8/15/09. Accepting traditional and experimental prose, poetry, graphic
memoir, narrative photography, lies, and more. All submissions eligible
for contest entry. Submit online or mail to: Memoir (and), P.O. Box 1398,
Sausalito, CA 94966. Guidelines at www.memoirjournal.com.