[ccmoberg]

Having just placed a startup in SoMa, I'll say that the inconvenient CalTrain <-> BART transition is an issue. If you are looking to draw employees, mentors or investors from the peninsula, that one BART station makes a big difference. I expect this will change significantly once the new SoMa transportation hub opens and you have CalTrain lines that dead-end at a BART station.

[rekoros]

Yeah, the W. Oakland to South Bay connection is hard, both via SF and 880.

However, it's about as hard as it is for the SF Downtown <-> South Bay connection, since to get to Downtown from CalTrain, you have to pass by a BART station :-)