Having dumped WSMakeStubs, I'm looking at the WebServices Core again, and this time I found that Todd Ditchendorf has written a nice tutorial about it. I'm working my way through it and it looks promising

The Mono project has a new member: Cocoa#. According to their site CocoaSharp is aimed at .Net/Mono developers that want to allow their users to have a native Mac OS X application experience.