Looks like the next release will be adding features – not the overall core API changes like we saw in Preview 3.
Some items: OutputCache attributes over actions – this is nicely done! I’m looking forward to it. Also, the error handling capabilities with friendly messages, handling certain exceptions, etc.. is going to really help as well!
Security: a new ‘Authorize’ attribute will be added as well as Account management (gee, I built this one already – but sure it nice to be a part of the project!)
Glad to see them adding in some cool functionality!