Firefox has as full DataChannel implementation (SCTP-based), while Chrome has a partial one (RTP-based). They don't interoperate yet. I implemented most of the partial implementation and am working on the full implementation now.
I'm glad that you're excited about them. I am too. I hope to have it ready for you soon :).
Out of curiosity - do you mean that you're writing a full SCTP-based implementation, or completing the RTP-based one? The standard draft specifies SCTP, right?
I'm glad that you're excited about them. I am too. I hope to have it ready for you soon :).