It'd sure be nice if someone from HN decided to live-blog it (hint hint nudge nudge).
Apart from the keynote, everything else at WWDC (except the parties throughout the week) is under NDA. If you attend WWDC, you implicitly agree to be held under that NDA. This also means no pictures or videos of the sessions, so I don't know how thorough of job someone could do live-blogging the conference.
Ahhh, I didn't realize all the talks were covered under NDA. Thanks for crushing my dreams.
(Seriously though, thanks for letting me know why I haven't noticed much in the way of substantial coverage.)