Honig's web site lists some clinics, usually.
I attended the Northern Kentucky one about three years ago. Its usually in March. They've got nothing up about 2010 yet. Its held about 30 miles or so south of Cincy.
There will be one in the Roanoke, VA area that has been detailed before on Refstripes.com -
http://www.brfoc.com/.
USA Football puts some on around the country. Some are just one day clinics and some are weekend, on-field affairs. Seems like the nearest weekend clinic has been in Tampa. They utilize some of the pro team facilities so I would look for Cleveland or Pittsburgh near you.