I'm looking for suggestions to a problem I'm going to encounter shortly with one of my apps:

The application is going to have a cashbook module added that will need to use multiple currencies and will need to regularly check the exchange rates.

Ideally, I'd like the desktop app to request this info from a web site so that I have a central place to keep the exchange rates updated (similar to .NET but having a desktop app request the info instead of a website).

Does anybody have any ideas? The best I can achieve so far is to have a file on the internet and use FTP to download this but thats a bit scrappy.