Bert,
I've been evolving my system to look like Dog's. I now have 3 servers - two are Citrix Xenservers on Dell 2900s and they run my application server (Windows 2008 Server standard) and 8 virtual PCs which go RDP to thin clients, or are just available for remote access. Another is SBS 2008. All are RAID 5 but I am thinking of updating to mirrored when I start updating to Windows 7 (or the next flavor) since 7 takes more room. I have two more workstations I can take to virtual computers, which would leave us with just 3 real PCs in the entire clinic. If I were better at the thin clients I would figure out to get rid of more workstations, but Medware seems to prefer real PCs and getting printers to work with the thin clients is hard enough, I don't want to even try to hook up a scanner. So far, working with Windows 7 has been a bear. I think I might wait for the next one before updating. We run eleven computer stations at the clinic (4 exam rooms, 2 front desk, 1 scanner station, 2 nursing stations, 1 laptop for PFTs, and my office). If I were smarter, I would start using Sharepoint more - it really has a lot of nice features. Other projects I fiddle around with are a managed switch to subdivide the network - I would really like to use a virtual switch for the virtual PCs and this should speed things up.