John H. , Mar 19, 2007; 10:14 p.m.
"Do I need a release or is this photo considered mine?"
Owning an image does not govern whether or not you need a release. You need permission of the person's whose likeness is in the picture if it is to be published for commercial purposes such as advertising.
A release is merely evidence that you have permission to publish another's likeness unless it is a contract based release. In the latter situation you promise to give or do something of value in exchange for being able to publish the other person's likeness. A verbal contract is valid but is difficult to prove. In either scenerio, a written signed release is useful evidence that you have permission to publish another's image for commercial purposes.
Researching concert photography is not a good way to research this issue because the rules are essentially the same whether the images were taken from a concert setting or not. Consult with a lawyer before enagaing in such business activities in order to obtain reliable information.