Desktop application C# or VB -.NET 3.5

This is a .NET Desktop application, that needs to have an installer/uninstaller, check for updates over the internet (at startup), authentication (through popup via webservice), etc....standard application and no direct access to the SQL server by the client. What the application actually "does" is very simple. Primarily, It gets updated when a table updates in the server. NOTE: 99.9999% of your work is here will be building a strong application that handles database connections masterfully. We will have 1,000-3,000 customers running this application at the same time. They all need to have Instant data pushed to them from the existing work-process database when it's updated. The application needs to have proper tray, running, and installation icons (we will provide), status notifications, etc. And will be constantly updated a database. Whomever bids on this MUST.....Have an intimate understanding of how to develop applications that communicate over the internet, push information to the client, and have 3,000+ simultaneous versions of the application running. And they must understand how to PUSH instant data in a way that conserves resources, and is designed for thousands of simultaneous instances running. And they Must understand how to get Instant dynamic customer information to individual applications instances within milliseconds (or at least as fast as Instant Messaging). The server side component is MSSQL 2005 server but you can install a webservice which I’m sure is needed. This Phase Must be done cost effectively. If project goes well you will most likely be first choice for other phases where applicable. More details to follow once we choose a coder. You will have to sign our NDA and software doc before we can choose you. Also note: Just to clarify.... We (the buyer) own 100% of all code you develop and 100% of anything you do for us. We own the copyright, the code, and any work you do for us in this project or any other project.