would I really need to purchase a web server in order to build an application on facebook?

[Joe]

Yes, you'll need a webserver. A cheaper option would be to get a virtual private server (VPS). See http://www.vpslux.com/?page=explained for a quick intro if you don't know what it is already.

You will need to have root access to configure your application. A shared provider account won't help much. They generally don't allow you to remote into the server and change things at all. And even if they do, they don't let you modify global configuration files, etc.

Also, be sure to get a fully managed VPS so you won't have to deal with security and maintenance. Plus, the provider will help out anytime when things go south.

Best