"Local devs, running local services, but how to share with everyone in the room?" Answer: rebuild all your tools to work across Bonjour. Slightly bonkers but very cool.

"Simply pull out your Poken and ‘high five’ it with your new best friend’s. Clever RF technology then zaps the info between the devices, so next time you log on to your favourite site, your profiles are linked. Genius!" Physical exchange of details, dead cheap, integrated through a web intermediate. Lovely.

"why on earth do we believe that just because technology can expose people means that it should?" danah, as ever, very insightful, on the problems of exposing user data, regardless of whether it is already "public" or not.

"Your lists of friends and connections on the social websites that you use, sometimes called your social graph, belongs to you. No one company should own who you know and how you know them." This could be interesting!

Danah's keynote from ETech. It's very good.

"the phatic function is communication simply to indicate that communication can occur." Leisa Reichelt on "ambient intimacy", Twitter, and some Bakhtinian ideas.

Friendship helps people write community into being in social network sites. Through these imagined egocentric communities, participants are able to express who they are and locate themselves culturally.

"Most people are deeply invested in the physicality of life; this is not going away".

My research is concerned with algorithms that exploit the combinatorial structure of networks and information.

How Halo2 got put onto Live.