As to Los Angeles...
KNBC has been promoting their new additions, Jeff Probst (at 2pm, replacing Gloria Allred's court show) and Steve Harvey (at 3pm, replacing Nate Berkus) during the network's Olympic coverage. Pretty much outside of that, nothing's else changing on Channel 4.
KABC, of course, is carrying Katie Couric's new show at 3pm, bumping Dr. Oz a hour early to 2, which of course shifts General Hospital to 1. Again, no other reported schedule changes.
I also don't see any changes, if at all, over on KCBS for the fall...they have the network straight from 7am to 2pm (with the half-hour break at 11am for news), The Doctors at 2, Dr. Phil at 3, back-to-back Judge Judy eps at 4, news from 5-6:30pm, Scott Pelley at 6:30, ET at 7, and The Insider at 7:30.
KTTV is picking up Ricki Lake's new show, although I forget what time it'll air. They're also airing Dish Nation, which had a test run on KTTV and six other Fox-owned stations last summer; now it gets a permanent slot. The test run ran at 6:30pm, after TMZ, and I'm guessing that's where it'll air this go-round.
I haven't heard anything else in regards to the other station locally.