For those of you not aware Google has been developing SPDY, which is a new protocol to help make the web faster. http://dev.chromium.org/spdy It runs at the server level and helps browsers and servers work better together.
Previously only Google Chome supported SPDY but now with the release for Firefox 11, it is now supported by a 2nd Major browser. Firefox has spdy turned off by default. I turned it on and saw a noticeable improvement is Gmail.
So now the real question is when will hositng companies start to support this protocol and what do you need to do to get your site to take advantage of it. It could be a little while as more testing and development needs to happen but we really hope that cPanle and other large hosting companies will adopt this new standard.
None that we are aware of (As of March 19, 2012) we just started this page and getting in contact with the different hosting companies.
If you know of a hosting company that supports this protocol let us know, we would love to get them added to the list.
Twitter -- learn more here: http://www.webmonkey.com/2012/03/twitter-catches-the-spdy-train/
Gmail -- We would hope that Googel would be the first to start to implement this standard.