
Fair point, my reply was one IT person to another really and I wouldn't approach a customer in that fashion. The main point I was making is, skills are needed to set up either a Linux server or a Windows server, you can't get around that fact, but the issue with windows is, you need the hardware, the windows software licences, the client licences (for each device to connect to the server) and the specialist to set it up, whereas a Linux server can do the same job, without requiring the software or client licences.
That's why I wouldn't personally use Windows for my servers, and in the majority of cases (pretty much anywhere there are less than 20,000 users) I'd advise going down the Linux route for customers too. As to why I say 20,000 users, the ability to allow users to logon from anywhere in a company is provided by a Domain Controller, the old NT4 style really starts to choke at around 30,000ish accounts, Active Directory on Windows 2000 and onwards (but not available on linux, yet) does scale well to at least 60,000 accounts, but at this point, Small Business Server isn't the option you need, so ultimately, I just don't think SBS has a valid place in the market.
As for my source for the number of users figures, they are personal experience having worked on large networks for banks and Government, and I'd like to point out that AD may scale very well beyond the point I mentioned, but I've never verified it myself.