Well what do you know... I'm also on youtube now. Together with several of our team members I'm demoing a custom renderer from the Code Gallery. Check it out!

Here are the links to the samples:

• Add Data Control
  
• Nik's Flickr Search Task
• Custom Renderers

Other samples that you should check out (because I wrote them :-)):

Utility library: Simplifies ADF development for a number of common tasks. For example add a resource in one line of code, or create a redline tool using only a couple lines of code.

DHTML ScaleBar: Pure client-side scalebar. Instead of using the map services for drawing the scalebar, it uses a pure clientside approach (javascript), removing the need for server requests and scalebar re-rendering. It's also useful for resources that doesn't support rendering scalebars.

If you want know more I'll be working at the Server Showcase at the ESRI User Conference next week as well as demoing some more samples at the .NET SIG.