3dbuzz has released it’s first ZBrush training videos at www.3dbuzz.com. The VTM isn’t complete yet, but he’s posting the parts as he finishes them. You can read more about it here: http://sv2.3dbuzz.com/vbforum/showthread.php?s=&threadid=15894
Pretty basic so far, but, knowing buzz, it’ll get advanced pretty quick.