Heads up! This post was written 11 years ago. Some information might be outdated or may have changed since then.
In nginx it is fairly easy task: in your config file just add
server {
listen 443 ssl spdy;
ssl on;
ssl_certificate /etc/nginx/ssl/..../ssl-bundle.crt;
ssl_certificate_key /etc/nginx/ssl/.../domain.key;
ssl_protocols SSLv3 TLSv1 TLSv1.1 TLSv1.2;
add_header Strict-Transport-Security "max-age=31536000; includeSubdomains";
add_header Alternate-Protocol 443:npn-spdy/3.1;
......
} More information for SPDY can be found at : http://en.wikipedia.org/wiki/SPDY