true , good idea , basically a dedicated stackoverflow 'sub' site ? you'd need to submit the idea to the SO team then it would need "backers" who would vote for the project , but it might be a great idea , indeed.
There is a Symfony2 proposal on Area51. But I agree with the discussion at http://area51.stackexchange.com/proposals/36634/symfony-2 - StackOverflow itself is perfectly adequate, and having two separate subsites would be unnecessarily confusing.