If a member creates a topic and there is no follow up, I think they should be able to delete that new topic.
I didn't realize you couldn't. Have you opened it and tried to edit/delete? I don't think it's possible after you receive a reply, that's true.
You can go here: http://help.dailypaintworks.com/knowledgebase/contact.php and ask the powers that be.You can message a moderator: http://arttalk.dailypaintworks.com/u/connie_mclennan/summary
or just give it some more time for peeps to find your topic.