UPDATE:
Thanks to slower-than-modem Wi-Fi connection I had been unable to add the links on time.
I have added more links after Steve Jobs Keynote ends. The coverage provided great insight on the Keynote.
Watch the Keynote webcast
http://www.apple.com/quicktime/qtv/keynote/
or
http://www.apple.com/iphone/keynote/
Many Mac-sites will be providing live coverage on Steve Jobs Keynote on Macworld San Francisco. More links will be added as they post their links to MacWorld Live Coverage.
MacScoop - http://keynote.macscoop.com/
LoopRumors - http://www.looprumors.com/keynote.php
Mac Rumors - http://www.macrumors.com/events/mwsf2007.html
Mac OS Rumors - http://specialevent.macosrumors.com:17530/
Think Secret - http://www.thinksecret.com/news/0701mwsflive.html
The Mac Observer - http://live.macobserver.com/article/2007/01/mwsfkeynote.shtml
Macsimum News - http://www.macsimumnews.com/index.php/archive/todays_the_day_steve_jobs_mwsf_keynote/
MacDailyNews - http://www.macdailynews.com/index.php/weblog/comments/12203/
I will be posting updates from MacWorld.