Nice one Joe! Definitely develop it! As you know, the .us market is not the best right now.
Maybe import roses from South America for mail order, or from Miami for that matter. Drop ship would be best to avoid warehouse costs, double shipping. Roses around here can be had for $20/5 dozen, or even less at spots. I know there can be problems shipping live plants across certain state lines (CA especially), not sure about cut flowers. Or maybe just develop an informational site about roses, types, care & maintenance, etc, then affiliate with 1800flowers, and similar.