Hey, we can really use your feedback too (link in my profile)!
Our site has not reached critical mass yet, but we're pretty close. Same space, different approach. Would be very interested to hear what you have to say about us.
I really like the layout and how clean it all is. I also like the fact that you take some design cues from Google with your logo/search box (nothing wrong with using design patterns!). I also liked the consistency when you clicked on a link - ie, the header and title didn't move.
Is that "What is Jaanix?" always the default link at the top? If so, great! In these nascent stages you should definitely be accommodating people with questions and establishing what it is you do. When Digg first came out people had a lot of questions about how that worked as well.
The tuners are great. I really dig how they're analogue - a lot of people make the mistake of stepping sliders for "tuning" functionality.
Such a small thing, but any chance of making the comment box slide out rather than pop out? Everything else looks so slick it was the one thing that stood out to me. Actually I also noticed videos seemed a bit clunky (click on one and then scroll to see what I'm talking about).
What would be great in terms of functionality is an Audioscrobbler style thing - name a few blogs and have the tuners get set for you.
Also have you done the pre-requisite widget for people to embed into their blogs, etc?
Not sure what other advice I can offer to be honest, you guys seemed to have nailed your concept quite nicely.
Our site has not reached critical mass yet, but we're pretty close. Same space, different approach. Would be very interested to hear what you have to say about us.