This is a long running question that people ask me - how to position the various server options from Microsoft for small businesses. The more choice Microsoft offers, the more complex it can become if you do not have a starting point to find the right product for a customer. So, Home Server, Foundation Server and SBS - what is it all about, especially when you look at something like Windows 7 or BPOS too? N.B. To get a detailed feature comparison between SBS 2003 and SBS 2008 have a look at the excellent work of Sean at http://sbs.seandaniel.com/2008/08/what-different-between-sbs-2003-and-sbs.html . Well, in the home or the smaller sized business market (think sweet spot of 1-7 users IMHO) there are a number of MS products that could fit the bill… Windows Client PC as a server (don't do this for businesses) Windows Home Server Foundation server Windows Server Small Business Server Online solution Server Options I suspect people know the options here, but here is a very short run-down on each and why...