I don’t usually do that, but here’s Ayende‘ presentation from last year’s Oredev conference (yes, it says 2007, but it really is from 2008).
It’s fun, very informative if you don’t know Active Record, and of surprisingly good quality (means you can actually hear what Ayende is saying, and see the code). Most of all, this is an awesome presentation.
How many times have you gone to a presentation when presenter said “Give me a domain model that you want to work on” and then went and implemented it!
It’s a must see. Highly recommended. And if you register to viddler, you can download the video in slightly better quality and resolution here.