Binary Protocol: Performance and Extensibility

I have talked to several sites about use of the binary protocol in memcached. Some sites already have this in production. There are benefits from a performance perspective but most are interested in its extensibility.

For those that are not familiar with the binary protocol look at Toru's preso @ http://bit.ly/G7PZt

The current draft spec see http://bit.ly/uRIE

Drop a comment or note below on your binary protocol needs.