I was there on August 28, 2008, which was mid-week. I was shocked at how empty it was. Honestly! It was my first visit since before the summer blockout dates, and I really expected it to be very crowded, but I wanted to bring my mother for her birthday and first visit.
Even one of the CMs said that they were expecting low crowds that day. We waited no more than 3 minutes to see Mickey in his house, mid-day - that's how empty it was.
I'm sure it will be different this August because of WOC, but just thought my experience might be helpful.
Also, here is a link to the SoCal Select blockout dates calendar:
http://disneyland.disney.go.com/dis...nualPassholderSoCalSelectBlockoutCalendarPage
You can see all the different pass blockout dates by clicking on "View Calendar" on this link:
https://secure-disneyland.disney.go...ated/landing?name=AnnualPassholderLandingPage