I too have been testing this WHS Backup Solution on small networks. Simply mapping the drive from another computer to one of the WHS User Directory. I have not been able to get a server to load the connector addin, in an attempt to create an automated image, similiar to the client native with WHS. Any tricks to get it to load on a server, not adding it to the domain, SBS will not work with multiple servers on a domain, plus it's against the EULA!
Thanks