updated 08:25 pm EDT, Fri June 18, 2010
OS X 10.7 hinted at in WWDC releases
Some of the first hints of Mac OS X 10.7 have surfaced in material coming out of WWDC. A component of the iOS 4 gold master, AV Foundation, is ultimately part of the next desktop OS. Some of the sessions at the primarily iOS-oriented event also referenced future developments for 10.7, even if their final goals weren't evident.
John Gruber has also tapped his historically reliable sources and now believes that progress for the new Mac OS X version is "picking up steam." Some of this has been in evidence through web data logs earlier in the year, but the actual state of development hasn't been mentioned in the past.
Both Mac OS X and iOS tend to feed on each other, as APIs or other techniques developed for one are sometimes rolled into the next version of the other. AV Foundation's role isn't known, but it would likely connect to apps like QuickTime.