Also, the panel seemed to agree that two or three great stories--wherever they are published--can really launch an author's career. A great story on a small webzine can create a huge buzz on the web and in the blogosphere.
Finally, Sheila Williams, Asimov's editor, said that publication credits at a respected e-zine do make her more optimistic about a story that comes her way. Obviously, the story itself matters the most, but sales to an e-zine indicate that the author knows what he or she is doing.
So, get those stories in to Electric Spec! It could be a launching pad for your career. (Just remember us when your famous).