This is a big deal for sites that want to rival Google sites performance-wise. Especially now that it will be in Firefox 11 in addition to Chrome. It would be great if any of the popular proxy servers - like Nginx - also had support for it.
I presume that it doesn't support SNI (for SSL vhosts) as the underlying JVM doesn't support it for servers? (I couldn't see anything in the docs, and it says it uses the JVM's SSL support underneath.)
One of the Google chaps said that SPDY required SNI when it was originally announced, so I was hopeful for a while.
Server Name Indication was added in Java 7, so I would expect that Netty supports it too, assuming you're running the latest version of the Java runtime.
the missing piece is next protocol negotiation. we're working on releasing this code soon. expanded support in finagle (github.com/twitter/finagle) is also forthcoming.
Yey ! I just wrote a server on top of Netty and figured out how to use SPDY to boost my performance but couldn't find SPDY implementation for Netty. Thank you twitter !