SC2Mapster

Don't forget, Blizzard wants our tutorials! Head over to the thread and submit a link to your favorite tutorial or even one you've created yourself! Also worth mentioning, Tenarsis (one of the Developers posting in the Battle.net Custom Maps forums) wrote up a small tutorial/explanation on how to customize UI within your maps.

Arcade Highlight by GameSpot

I wanted to feature this article/video that Blizzard actually blogged about in preparation for what will be a huge influx of new/returning users for Heart of the Swarm. Not only that, but it's a major press outlet reporting on the Custom Map system in SC2, and that's a good thing, :).