Saw this blog post on developer force and it looks like Salesforce.com is now officially endorsing the Q & A site proposal. Hopefully the proposal will now gain some traction!
You're correct; Salesforce is endorsing this proposal. I've been working closely with their developer relations team and legal team, and we are excited to have their support for this site. It's awesome and rare to see a company support and empower their community in this way, and I'm happy to have their help moving this forward.