I have another FPVOD today with me playing as Zerg vs Dimwitt as Protoss. This match is kind of a standard (at the time this is pre-Patch 6) of the two races. It shows how the versatility of zerg can really break a player. The fact that at a moment's notice I can start building a counter to a player's force really helps in this match-up particularly.
As you can see controlling the watch towers really helped me out in this match-up too. Now that the game has been patched, going mutas vs protoss may not be as viable.
I do want to take a moment to mention Endrick's new endeavor. If you guys didn't see my comment about him earlier, he is a platinum league terran player who posts some helpful commentary from time to time. He has since posted two more (a TvZ, and a TvT) matches with commentary up on his new site http://www.scaudios.com/. Should be fun to see some of the things he has planned for his new site.