I was just perusing Wiki and noticed that Livermore now has two stops for the ACE, a commuter train from Stockton to SJ. A LIV to SJ one-way trip takes one hour, seven minutes.
It also stated a petition drive had been undertaken by a fmr mayor of Dublin to bring the BART all the way out to Livermore but I do not know if the idea ever made it on the ballot as it would be VERY expensive to do so.