.. from a web service. You can either follow one of the predefined standards (SOAP), or you can come up with your own XML format.<BR><BR>Then, anyone can make an XML request and retrieve your site's content. At that point, it's up to them to transform it for their display needs.
But, my generic answer is: Google.<BR><BR>If I were in your shoes, I'd probably go get some books. So, I really don't know of any sites to suggest to you.<BR><BR>I know 4guysfromrolla.com had an article on writing (or consuming) web services in classic ASP.<BR><BR>Is ASP.NET an option? Web Services are a core part of .NET.