I don't. The guy is an engaging figure. He will win easily.
Rhetorical question, of course, but I have checked out the DU, Kos, and Mydd and naturally they're all quite enthusiastic about his candidacy. But I also checked out sites where the Democrats are quite knowledgeable and they're worried about him running. They seem worried about Mfume running costing them this seat and want Van Hollen to run and beat him.
Of course, your prediction may turn out to be correct or turn out like your Castor vs. Martninez prediction.