Hi, my name is Brendan and I work for Sponge (www.getsponge.com) - We are a Q&A solution in a closed beta as well, but we have several deployed examples in the wild - you can email me at brendan@getsponge.com, I can show you and we can see if there is a fit for what you are looking for.

awesome, sending you an email.

I believe that's what YC startup Opzi do, although they're still in closed beta.

Sweet going to chk them out and see if they need testers, thx!

A quick search gave me these 3 PHP solutions, http://digitizor.com/2010/12/01/stackoverflow-clone-php/

I thought Stack Overflow actually licensed their software where you can start your own Q&A site on whatever. Might be something to look into.

Yep was hoping someone had some direct exp, I can search pretty well too :)

Don't really like those guys and I don't think they are doing licensing with their new model.