SecureVantage has some excellent training available on their web site for Audit Collection Services.  The training consists of a series of presentations from well respected System Center Operations Manager experts.  In fact most of the presenters are MVPs.  On a more dissapointing note, they did let a little-known slacker (some guy named Steve Ross) present on one topic…ACS DR/Failover.  You may want to steer clear of that one. 

Check out the whole series here.