BSides London is something I've been looking forward to, since I came to the UK for my BSc study. However, I wasn't able to attend it because the date clashed with my programming exam. Shucks!
At least I'm still able to watch the recordings of some of the talks on their YouTube channel.
Here's some non-technical talks which were brilliant:
English, Do you speak it? by Javvad Malik
Hacking Senior Management, Getting your Message Across by Brian Honan
An Anatomy of a Risk Assessment by Thom Langford
A Salesman's Guide to Social Engineering by Gavin Ewan
Breaking into Security by Robin Wood
Some technical talks that were awesome:
A Whole New Attack Vector by Robert McArdle
Escalating Privileges on Common Web Apps by Sandro Gauci
Introducing to Offensive (Web) Testing Framework by Abraham Aranguren
Randomness by Paco Hope
Windows Phone 7 Platform & Application Security Overview by David Rook