From the inital post:

I am wondering why there isn't any effort in the PHP community to get PHP into the DLR. If nothing, DLR is yet another platform, and for a php programmer it gives one more playground to showcase his skillset. Anyway, my question is whether there would be any community effort to get MS adopt PHP into CLR too. I am sure there is a genuine customer requirement, and enterprises have made quite a bit of investment in PHP and they would all love to be able to take it to the .NET platform.

Responses so far include the pointing out of problems, possibilities like a Zend collaboration and lots of talk on what such a project would entail.