Sinatra + websocket + Celluloid

Hi does anybody know how to put in place a quick code example of a Sinatra app running on top of Celluloid:IO and using websocket?

I know of the existance of Reel for Celluloid ("Reel is a fast, non-blocking 'evented' web server built on top of Celluloid:IO" ... and supports websockets straight away) but nonetheless I'd like to keep using Sinatra because I like it, I've become accustomed with it, and I'd rather not rewrite a lot of code...

Hope you can help.