What's the ideal language to write a new Facebook app in?

I'm getting my feet wet with the development of Facebook a开发者_Go百科pplications and was curious if anyone here had some feedback on the subject? I understand that FBML has now gone the way of the dodo, and before making the plunge want to be sure I'm not ignoring the favored language for Facebook application creation. I'd hate to get knee-deep in code only to discover the notoriously quirky Facebook deals far better with one programming language over another.

Is there a consensus on this yet, or is it too preferential to say?

I'm a huge fan of the new Facebook Graph API which I believe has replaced a lot of reliance on FBML, and has definitely replaced mine. It is really easy to use, and can be simply accessed in any language. In my opinion, PHP is the easiest language to use with Facebook applications, mostly because of their supported SDK.

Best, Macy