Podcast Producer Server, what should I use?

The first thing Podcast Producer asks for is my server.

I have put in the server I use for "Podcast Maker" (what I currently use) and get dead-ended with no connection.

I would also like to know if I can use my Mobile Me account as a server for Podcast Producer. Have tried my MM login settings and also get dead-ended...

The help pages for PP2 make no mention what server to use and how to set it up.

Any help would be very much appreciated.