we've been brokering photos for five years, when 2257 became an issue we launched ezsets.com to package the ids/releases with every set.
take a look
http://ezsets.com/ in the photographer section, you can signup for a photographer account and start uploading sets. everything is 2257 compliant. You upload sets with the ids / docs inside.. and we have a streamlined approval process that gets your content online. 40% non-exclusive commission or 60% exclusive.