Cocoa for C# is gonna be the great addition too! I am the Software Architect and mostly working in C#, so it would be superb to learn from someone's experience related to Cocoa
I agree with this. I'm a C# developer by day (pays the bills) and iPhone developer wannabe by night (Mac is personal platform of choice and iPhone a newly acquired gadget). C# and Cocoa sound like my cup of tea.
And I agree, we need a programming question category. Though I suspect the definitive one will be done by Apple and shadowed by the http://www.cocoabuilder.com/ folks.
User Experience please! Vitally important as there is not much info out there and designing good UX for the iPhone is a lot different to designing for the web!