Received this info from friend, saw it on SD. Looks like legitimate. Considering to purchase using virtual credit card...
Oakland, CA Zoo - $40 family pass for the year Unlimited admission 363 days of the year at the Oakland Zoo for up the two named, cardholding, adults (ages 18 and up) and any four children (ages 2-17)
Free parking at The Oakland Zoo for one vehicle
Free guest pass (for one-time use) for 2 adults and 2 children at The Oakland Zoo
Free (8) coupons for rides
Free admission to our Members' Nite event and subscription to Roar! the Zoo's newsletter
Discounts at the gift shop, for Zoo Camp, birthday parties, for Walk in the Wild, ZooLights, and other special events as well as to 125 zoos and aquariums nationwide
Click here to view the offer: http://www.savvysource.com/event/home_san-francisco-bay-area_ca
And note that 5% of your purchase goes to a preschool of your choice and another 5% for scholarships for children who otherwise could not afford to go to preschool.
P.S. Take the coupon to the Zoo before Sep 30, 2010 to redeem a full year pass, and you can get free parking on the first day you visit Oakland Zoo!!