Hi, sorry for the radio silence. mod_spdy has indeed been donated to the ASF, so future updates will be happening in the httpd source tree rather than on the
code.google.com site. I've updated the text on
https://code.google.com/p/mod-spdy/ to reflect this. I don't know exactly what their plans or timeline for mod_spdy are going forward, but you could try asking around on the Apache mailing list.
(Meanwhile, the existing mod_spdy packages for Apache 2.2 aren't going anywhere -- they will continue to be available and will continue to receive security updates as necessary. But no new features are planned for the old source tree.)
Cheers,
-Matthew