The Incrediblepbx hosted Asterisk server distributioni is unique in that they are using their own Freepbx module respository.  .  There are also many add on scripts for doing various things automatically.  Our Incrediblepbx Asterisk hosted server comes with a custom front end GUI for direct access to various areas on multiple security levels.  This is exactly the same GUI with all the scripts and everything else that you get if you were to install from ISO image directly onto dedicated hardware.

For support, Incrediblepbx has a very active forum.  This is currently one of the better places to get information about Asterisk + Freepbx in general regardless of which distribution you choose.  This is also one of the better places to get tips and tricks to do many things not typically included with all the various Asterisk distributions.