I recently presented a Hacker Academy Deep Dive webinar on 'Analyzing Malware in Memory'. The purpose of this presentation was to show how in-depth malware analysis can performed on memory captures. It went through a number of malware samples, both in userland and the kernel, and showed how to detect and analyze them with Volatility. The replay page has a link to the video and slides of the presentation.
If you like what you saw in the presentation, you may consider one of our training courses, taught directly by the Volatility developers (2013 opportunities to be announced soon).
If you have any questions, please comment on the blog post or you can find me on Twitter (@attrc).