San Ramon High School Classes of 1977 and 1978 have scheduled a Class Reunion for the weekend of October 13, 2012. Guy Houston is organizing this from his Facebook account. See the accompanying screenshot for more information or contact Guy on Facebook. Judging from the price, this looks similar to the informal format of the '78/'79 reunion in October 2009. By the way, the annual Primo's Half Marathon is also held that weekend, so start training now!
I expect that members of other classes (such as '79) who have good friends in those older classes would be welcome to join in on the fun. I know that if I get out to California for that weekend, that I would sign up. Pretty good price!