I am in the process of starting a site with a buddy of mine. We've gotten an initial prototype up using WordPress and some homegrown PHP, but as we start to consider fleshing out the more advanced features we want to provide, we are considering other options for server-side development.
I suggested perhaps going with ColdFusion since I am the primary developer on this project at this point, and that is my strength when it comes to the server side. I have little reservation about how to do much of the proposed functionality in ColdFusion, but not so much confidence yet with PHP.
My friend and cohort in this endeavor is concerned about ColdFusion's longevity. I think it's fairly well established, and Macromedia doesn't seem like it's going anywhere anytime soon, but nonetheless, I thought some statistics might be interesting. My friend suggests ASP.NET, but then again he's a little bit of an MS-whore. Just a little...
So yes, I did a little searching with not much luck. I guess I'm not sure what strings to search for. If anybody could point me to some relevant resources, I'd appreciate it. Thanks!
Edit: Ooh! Almost forgot... I'd be especially interested in any insights into the development communities around particular languages. Their perceived strengths, weaknesses, proliferation, etc.