The best professors in this fields are by my point of view these 2 guys:Ng. Andrew and Prof. Pallab Dasgupta.
I have been watching all their tutorials on BBN and they were very usefull.Just follow the links and you will find more AI lectures with this 2 interesting guys.
link1:http://www.eetindia.co.in/VIDEO_CAT_800003.HTM
link2:http://see.stanford.edu/see/lecturelist.aspx?coll=348ca38a-3a6d-4052-937d-cb017338d7b1
link3:http://stackoverflow.com/questions/345280/bayesian-networks-tutorial/1965503#1965503
Have fun learning with them, Mike