As mentioned by Ivo Flipse, Day9 has done a few casts of inexperienced players. These are the ones I could dig up (a couple casts were during the beta, so some things may be out of date, but the main ideas are still there):
Day Daily #115 - A Fun 2v2 of My Housemates
Let's take a break from the usual analysis to admire the beauty of Starcraft 2: the game can create epic matches between players of all skill levels. In #115, we get the chance to watch a game between players I live with! I got the chance to see this game happen live, and it was quite a treat to see :D
Day Daily #121 - Plugging Leaks in Silver Level Play
In this episode, we examine a silver and gold level players to point out some classic leaks of inexperienced regulars.
Day Daily #146 - Gold Level 2v2 Analysis
For anyone looking for silver and gold level 2v2 strategy, this is a must watch. I look at a replay from some very average players and discuss general strategy for 2v2 play.
Day Daily #163 - Gold Level: Fixing the Little Things
In this episode, we take another look at Gold and Platinum level play and how to really improve, what to think about during the game, how to watch your own replays to improve, and other basic topics to help you be a better gamer.
Day Daily #164 - Low Level Reps - In-game Decision Making
This time, we examine the importance of going into a game with a plan, especially for lower level players. We talk about a players starting plan, we see how it does and look at how to change your plan in the middle of the game when it's necessary. We also really look at the little things that are important that non-diamond players often forget.
Day Daily #208 - Live coaching with djWHEAT (this one is very interesting)
We'll be doing a live coaching session w/ DJWheat direct from Phoenix Arizona where we'll help try to find some of Wheat's leaks and point out how to be thinking during a ladder match.
Edit: added #121 and #164 (found by Andy Giesler).
Edit2: added coaching session with djWHEAT, which is really interesting because they focus on the processes used while playing. It was an eye-opener for me.