Counting GFP colonies

[Paul Boucher]

I am interested in counting colonies that stably express GFP for 
cytotoxicity assessment studies.  I want to be able to count colonies 
that lack and express GFP.  Is there an easier way of doing this than 
counting the colonies under a fluorescent microscope?  Perhaps some sort 
of fluorescent dish scanner.  I would appreciate any input.  Thank-you.
	Laura Zerbe Rubsam