No one interested in interfaces? My impression is that interfaces is very commonly discussed, and is one of the most anticipated features in the language, though it may not come until v2.0.
OK, I was being hyperbolic. It's just that the interest is low compared to other features, as most people involved in the project are used to dynamic languages and don't feel the need. It's been in discussion for a long time, with no action so far. From what I've seen, the general attitude is a bit dismissive of the utility of static verification ("its different in our language because X" type attitude)
My impression with this is that it's mostly coming from a few academics that never work on code they haven't written themselves, and that have no understanding of use-cases other than their own...