Nice work. And there's other implementations too on the project web page: https://sites.google.com/a/chromium.org/dev/spdy. Seems all google sites are using SPDY for ssl now; that is evidently the lowest hanging fruit for speed gains.

You can see it in use in chrome by visiting chrome://net-internals/#spdy

No idea when it's going to be supported in any browser besides chrome, though ..