"I also think there's tremendous value in creating a dedicated music graph (as opposed to a social network that also has music); it's in your best interest to follow (or unfollow!) someone regardless of whether you're strangers or best friends. It's all about the music you're going to get from that person in your playlist of jams." Yep, this - which is the thing I always try to explain about TIMJ. I don't follow the list of people I follow everywhere else; I follow people who make my playlist of music better/worse. It means I discover all manner of new music, but I hope nobody takes it personally. (About the worst thing you can do on TIMJ is just import all your Twitter contacts and not add anyone else ever).

"Thought experiment: what if tomorrow Facebook announced Facebook TV? Would their default UI -- a stream of recommended items from your friends -- be more or less compelling than Google's search box?" It probably would.

why do it? To borrow from the site's About pages: "First, it will help you find shows that others have not only watched, but are talking about. Hopefully it'll throw up a few hidden gems. People's interest, attention and engagement with shows are more important to Shownar than viewing figures; the audience size of a documentary on BBC FOUR, for instance, will never approach that of EastEnders, but if that documentary sparks a lot of interest and comment - even discussion - we want to highlight it. And second, when you've found a show of interest, we want to assist your onward journey by generating links to related discussions elsewhere on the web. In the same way news stories are improved by linking out to the same story on other news sites, we believe shows are improved by connecting them to the wider discussion and their audience." Dan Taylor explains Shownar from the BBC's perspective

"Shownar tracks millions of blogs and Twitter plus other microblogging services, and finds people talking about BBC telly and radio. Then it datamines to see where the conversations are and what shows are surprisingly popular. You can explore the shows at Shownar itself. It’s an experimental prototype we’ve designed and built for the BBC over the last few months. We’ll learn a lot having it in the public eye, and I hope to see it as a key part of discovery and conversation scattered across BBC Online one day." Matt talks about Shownar on Pulse Laser.

"Designing playful IAs means taking care that you encourage discovery, support exploration and provide feedback on mastery." Kars' whole talk is great, really.