Unfortunately, he was ill already then and he was ill when I communicated with him what I wanted to see happen and I also posted a patch etc to him. He mentioned to me (in a private email) a lot of work they've done on the code in a private branch and he invited me to get access to that code to speed up development and allow me to use their code.
I never got any response on my eager "yes, please let me in!" mail and I've since mailed him twice over the period of the latest months and as there have been no responses I've decided to slowly ramp up my activities on my side while hoping he will soon get back.
I've started today by setting up the spdy-library mailing list. I hope to attract fellow interested hackers to join me on this. The goal is quite simply to make a libspdy that works for us. It is to be C89 code that is portable with an API that "makes sense". I don't know yet if we will work on libspdy as it currently looks, if Thomas' team will push their updated work soon or if going with my current spindly fork off github is the way. I hope to get help to decide this!
Join the effort by simply adding yourself the mailing list and participate in the discussions: http://cool.haxx.se/cgi-bin/mailman/listinfo/spdy-library.
And a wiki on github.
Update: I've created a hub collecting all related info and pointers over at spindly.haxx.se.