I think most people have noticed that Stack Overflow has a heavy bias towards C# and to a slightly lesser extent Java. Given that the purpose of Stack Overflow is to provide a Q&A site for all programmers (One site to bind them all.) How can we go about attracting more developers with other fields of expertise?
I'm mainly a .NET/Java developer, but I occasionally have to delve into other languages. I think the number of people who can answer questions in these realms (especially the ones to do with the setup of a developer environment) without having to say "I'm not really an X developer" is quite low.
Should Joel Spolsky and Jeff Atwood partner with prominent Java, Delphi, Perl, PHP, Python, Ruby, etc. bloggers? Or at least have them participate in the podcasts in exchange for them mentioning Stack Overflow? Maybe they could guest star on their podcasts and talk about the benefits of the community that we've been building?
Note I'm not saying there aren't any people with these skills. There blatantly are, there are just less than there are C# and Java developers.