My good friend Miguel A. Castro was on DotNetRocks for show 136 (released this week). I’ve listened to a lot of DNR’s and I have to say that in my opinion this is one of the best ones, and I’m not saying that because Miguel has been a friend for over 18 years (yes, it has been that long).
Miguel covers a lot of stuff regarding web controls and imparts a lot of useful knowledge in an hour and fifteen minutes.
If you’re at all into ASP.NET based programming and want to learn some stuff about building custom web controls, including managing state, give it a listen.