Zhaobao Taijiquan pushhands by, I think, Wang Qingsheng (someone correct me if I'm wrong):
http://www.youtube.com/watch?v=C3Qex7QFLss&search=taiji
One particularly nice version of the Yijinjing ("Tendon Changing Classic", more basic body conditioning than truly internal training, but good nonetheless):
http://www.youtube.com/watch?v=Y72-29g7Tes
Josh