Man, regarding IRC you can read enough around the web... a simple search is enough to know more.
About the cloud service, well, it's still in development, and is intended as a paid service which basically lets you get an account and a virtual private server, on which is installed BackBox and from which you can do your penetration testings, without the need to have your own machine with BackBox installed... so, let's say, even from your phone for example.