For the last 20 years I have pretty much stayed away from SBS even though most of my customers fall in to the Small Business category (25 workstations or less). With the advent of SBS 2011 I am going to start migrating them to SBS 2011 and try and leave the Microsoft SBS 2011 file structure and AD structure the way SBS 2011 installs it.
Most of my servers have two disk partitions. C (System) and D (Data). In looking at SBS 2011 it almost appears as though Microsoft is pushing a one partition (C) OS. Yes? No? Advantages? Disadvantages?