Some images posted from this years apple WWDC show are over here. They say "introducing longhorn", "this should keep redmond busy" and "Redmond, we have a problem". These are the first images online (removed elsewhere) of the new OS 10.4 "Tiger" I've seen. Tiger will be introduced at this years WWDC, which while there is no live video feed, but apparently macrumors will have "almost live" info. The site seems to be down now though :)
Scoble, or at least some of his commenters, are annoyed.
Update: The site is back up in a low bandwith version, updates every three minutes and has pointers to IRC channels with live updates.