While I did not realize it - my presentation on Dynamic Memory at TechEd US 2010 this week was recorded - and is now available for all to see:

Which means that everyone can see how my demo went off the tracks for a moment! (sigh).  Apart from that - there is lots of good information about dynamic memory in there.  You can also download a copy for offline viewing from the official TechEd site here: http://www.msteched.com/2010/NorthAmerica/VIR304

Finally, I should also say thanks to Matt McSpirit - aka virtualboy - for alerting me to the existence of this video.