Alejandro,

if I can add something to what Martín has said, I would say that for a small Terminal Server implementation (1-2 servers) the main advantages of Citrix are:

- Printing: citrix support universal printing so you don't have to configure the server for each client printer. In Terminal Server you have to setup each client printer on the server, and although you can map printers to use a specific driver, sometimes is not easy. this should change with Windows 2008 Server, and you cvan always buy a universal printing solution to install in a TS server.

- Application publishing: this should not be your case, as you are going to publish only one application. But if you plan to publish more applications, then it is convenient (so that you don't have to give the user a complete desktop with all the applications).

- Seamless Windows: in citrix the windows resize as if the application is in your computer; with the RDP client in Terminal Server your application window does not resize. This should change with Windows 2008 server.

Take into account that Citrix is not the only alternative you have. There are other similar solutions which are cheaper; among them as far as I know the most used are: Jetro CockpIT, and Tarantella New Moon Canaveral

Hope that helps,
Javier.

>Javier, Martin and Metin,
>
>If any of you know, can you compare TerminalServer vs Citrix Presentation Server: cost vs advantages.
>
>TIA,
>
>Alex
>
>
>>Alejandro, sorry if I jump late, but I think you should have clear by now that for every user connecting to your server you are going to need 2 licenses: a CAL (Client Access License) for Windows 2033, and a CAL for Terminal Server. The CAL for Windows 2003 is going to be around 30 dolars, and the Terminal Server License is around 80 dolars, so plan about 100 dolars for each user.
>>
>>The only case in which you can skip this license is if the user has bought Windows XP Professional prior to April 24, 2003. Copies bought before this date are entitled to access Terminal Server Servers. Nevertheles, asking your customers to show proof of purchase might be cumbersome.
>>
>>You can setup your server to license "per user" or "per device". In "per user" mode the same user can connect from different computers with the same license. In "per device" mode several users can connect to the server from the same computer (device) with the same license. In your case "per user" seems to be the most suitable.
>>
>>Hope that helps,
>>Javier.