This is really cool! You did a great job with this. I'm glad it's something you're actively using, that's the hallmark of a good product -- users :D

A teeny tiny nit-pick, the bottleneck diagram ... frustrates me. I think the intent is you want to depict the fact that different [classes of] users experience friction with various obstacles ? I don't know, I personally found that it took away from your otherwise very cool article. A live demo would add to the intrigue and fun aspect of your write-up, although I don't know if you are interesting in making a "massively multiplayer online dotolist" ;D