Search Google for "SEO forums" and you'll get:
1. SEO Chat Forums = DEAD
2. High Rankings SEO Forum = DEAD
High Rankings SEO Forum
3. Search Engine Optimization - Warrior Forum = VERY MUCH ALIVE
Search Engine Optimization
So why is the Warrior forum alive and kicking? Because they reinvented their forum around social media, that's why. And that deserves a big congrats. Kudos!