I've been forced to use VSS over a slow connection. (VPN over cable modem). Anytime the connection speed dropped under about 700kbps the performance was intolerable. I had to setup a system onsite and terminal service into it and do all my development that way, SourceOffSite is another solution to the problem. The problem is that VSS works at a slightly higher level then an old dbase or access database. The clients do all the "database" manipulation through file shares on the server.