Content importer author

I'd like the ability to have an email field for a content importer to assign an author rather than automatically assigning the sender of the email as the author. For instance we've got some people who write articles but I just don't trust enough to allow them to email their stories correctly to our breaking news importer. So an editor or someone a little more tech-savvy would have to do it and the system will set them as the author rather than the actual author.

I know there are no other fields available but maybe having a code like >>jsmith<< will be read as the author and John Smith will be set as the author while the rest of the body would be the body of the asset.