http://www.cisco.com/web/learning/le3/current_exams/642-522.html
The new course offering covers the ASA. FWSM, and PIX, it was just introduced, so I would give it a month or so to work out the training bugs (train the trainers first, so to speak). Even though it is part of the certification path, it looks like a very good training module. It does cover Multicast, but just a quick overview of configuration. If more in-depth is needed, I would look for MCast specific training.