Read the terms of Crowdspring's user agreement carefully as well..
"9. Intellectual Property
(a) Content License and Access. When you submit content to the Site, you grant us a non-exclusive, worldwide, perpetual, irrevocable, royalty-free sublicenseable and transferable license to use, reproduce, distribute, prepare derivative works of, display and perform the content in connection with the Site, in any media known now or in the future."
Otherwise, read up on why it's often a bad idea for designers to work like this:
http://www.no-spec.com
http://www.no-spec.com/articles/design-contests/
http://freelanceswitch.com/designer/design-contests-devaluin...
Read the terms of Crowdspring's user agreement carefully as well..
"9. Intellectual Property
(a) Content License and Access. When you submit content to the Site, you grant us a non-exclusive, worldwide, perpetual, irrevocable, royalty-free sublicenseable and transferable license to use, reproduce, distribute, prepare derivative works of, display and perform the content in connection with the Site, in any media known now or in the future."