Megabus Service LA to SF, OAK, SJ, Reno, Riverside, LV $1 each way

http://us.megabus.com/.aspx
Daily express, city-to-city bus service with free Wi-Fi from $1
All seats for travel during Dec.12-19 to/from newest cities will be $1
Company returns to West Coast based on customer demand

NEW YORK, NY (November 28, 2012) – Megabus.com, the first city-to-city, express bus company with fares from $1, today announced expansion to California and Nevada. California and Nevada residents can now travel express to/from Los Angeles, San Francisco, Oakland, Calif., Riverside, Calif., Las Vegas, Sparks/Reno, Nev., Sacramento, Calif., and San Jose, Calif. for as low as $1. Frequent daily service will begin Dec. 12, and customers can begin booking travel at www.megabus.com today.
Fares start as low as $1 every day and increase gradually as the traveling date gets closer. Customers are encouraged to book early to secure $1 fares.

“Express bus service from new hubs in San Francisco and Los Angeles is another way megabus.com keeps Americans connected,” said Mike Alvich, megabus.com’s vice president of marketing and public relations. "As California and Nevada residents continue to look for ways to stretch their dollar, megabus.com is committed to safe, affordable travel during this holiday season and beyond.”

To celebrate the new service, during first week of travel Dec. 12-19, all tickets will be $1. Megabus.com always offers fares as low as $1, with many other affordable fares on all of its services.

I searched thru any dates in Dec and it seems like all the routes are $1. Total price is $2.50 RT YMMV.