Miso is kinda like Foursquare for TV – you check-in to programmes you’re watching.
Whereas “Bob just checked in to North Acton station” is so what, “Bob just watched Madmen episode 4×10 can elicit real interest for a conversation – “Ooh what did you think of the bit where…?”
I suspect we’ll see a slew of other non-location check ins – sports games? fashions? video games? books? I can imagine “Dave just checked into The Girl Who Kicked the Hornet’s Nest” being a basis for a conversation.
One of my favourite NPD tricks is Break One Rule – take a successful formula and change one thing. I think Miso does this well.