I've set that the user must self-assess first but the delete is necessary.
I am using the new version of the workshop module for Moodle 1.5 and it has such a delete link. I just have to click on "Administration" on the workshop page which takes me to a page with several tables, one of them headed "Student Submissions" and next to each submission there is a "Delete" link.
thanks for the tip!
I'm really looking to forward to 1.5 where the workshops apparently use the HTML editor as the interface for submission! Anything to get away from uploading files... especially .doc files ;0)
best, and thanks!