One Chassis of IBM, or similar, blade servers could possibly handle about 1000 users (use at least two for redunancy). I agree with Jim that Softiricity is ideal for a wide ranging system design (Metaframe PS 4.0 may be sufficient with the forthcoming application isolation environments). So a "green field" scenario would use blade servers, Windows 2003 and/or LINUX, Softricity, Citrix Metaframe/Web Interface and possibly VMWare for a number of other specialized roles that require unique servers, but not necessarily the cost and horsepower of a standalone server. Steve Greenberg Thin Client Computing 34522 N. Scottsdale Rd. suite D8453 Scottsdale, AZ 85262 (602) 432-8649 (602) 296-0411 fax steveg@xxxxxxxxxxxxxx _____ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Kenzig Kenzig.com Sent: Friday, April 15, 2005 6:27 PM To: thin@xxxxxxxxxxxxx Subject: [THIN] Re: Utility Computing How much money do you have to spend. If you can afford and money is no object, I'd put Citrix/TS servers on the front end with Softricity servers on the backend to deliver the apps. Check out their model. http://www.softricity.com/home/index.asp Jim Kenzig http://thin.net Chris Grecsek <> wrote: My team has been tasked to determine pricing for a utility computing/server based computing infrastructure that can support 1000 simultaneous sessions. Its built for a Microsoft environment using their products at the core. I was wondering, if given the chance, what others might choose for the basic building blocks. We are starting from scratch and can choose the right hardware and right software for the job whatever we want/need.