Web site accepting XML feed

[Bungle]

Hi

I am new to XML. Could someone provide me with a little information on how I would be able to create an web site in ASP.NET that would constantly be open to receive XML data from other web sites. I am guessing I will need a web service of some description, but could do with a little more information.

I have quite a bit of experience using ASP.NET, but just need this info to fill a gap in my knowledge.

Thanks in advance