The team I'm in, sc2testers.net has a big community of active testers/players that love custom games! US and EU regions only so far.
We have our own vent and love to play test things. So say you are a developer and want 6 or so players to really test out your custom game/mod and give great feedback, we're your team! We've already worked with other devs and authors of other mods and they appreciated our help so we figured why not help other developers with their projects through alpha/beta testing?
We've already helped out several authors with playtesting and great feedback. We also have our own vent if you'd prefer to chat with us while we play.
Contact me, Vaelek 939 (US region only) ingame or send me a PM on this forum which I check regularly. Happy testing!
I've had an awesome experience working with Vaelek and the rest of his team. They've helped me a lot with balancing my map for a large group of players and provided feedback that really helped me make my map shine.
If you're looking for great feedback and friendly people this is definitely the way to go.