So far, I've refrained myself from talking about Indigo in any specific way. Why? Well, basicly because I know next-to-nothing about indigo, not having written a single service using it ever (not surprising, given the lack of public builds of indigo and not being one of the privileged few with access to it ).
That said, let me just say one thing about Indigo: I don't really care all that much about Indigo supporting X or Y specification (but yes, it makes me feel tingly inside as well). What I do care quite a bit about is the programming model Indigo should bring to the table, since so far, it sounds like something I could feel much more comfortable with.
So yes, count me as yet another soul looking forward to the Indigo beta builds :)
 The longhorn previews builds don't count, don't have a machine I could ever run it in :)