CanSec was a blast. I had a real good time. Meeting people I only knew by email and seeing people I only see at cons :-)
Pwn2Own was quite interesting for mobile security folks like me. First, finally BlackBerry was pwnd and this was really hard work since there is no SDK and/or debugger available for BlackBerry (the Java stuff does not count). ZDNet has a longer article on the case. Second, no body was able to pwn Android and Windows Phone 7 - which is quite interesting to. Third, the iPhone (pre 4.3) was pwnd once again.
All in all the talks were quite good and mostly interesting. A collection of reviews on the various talks are here: day I day II day III by talk