This is a list of the business plan competions that I am aware of.  Please add to the list.

Babson Forum - $30,000 - Due Sept 7, 2008

Amazon Web Services Start-up Challenge - $100,000 - Due Oct 3, 2008

504ward - $100,000 - Due Dec 4, 2008

Tulane Business Plan Competion - $15,000 - Due Feb 23, 2009

TechCrunch 50 Conference - $50,000 - Due May 2009 (?)