As a person who may soon have the option of commuting somewhere where CalTrain would be useful, I admit I'm excited by the new Millbrae BART station (Or here's CalTrain's version of the story) that opens this weekend. Being able to transfer directly from BART to CalTrain will be a big deal going both ways, and this article discusses why it'll be more significant than the SFO connection that's part of the same package. Now that BART connects to CalTrain on the Peninsula, there's really no reason for them to continue expansion there.
By the way, still no (good) net at home, and I'm going out of town this weekend. Updates will continue to be ... nonexistent.