Someone should convince companies to let workers work remotely. Hell, I live on the peninsula and just don't want to commute to sf 5 days a week and most startups (definitely including every YC startup I've spoken to) demand you be in the office 5 days / week. So even being in the same timezone and having the flexibility to shift planned remote days and come to the office with a day's notice isn't good enough.

edit: and before I forget... Why doesn't everyone on the peninsula want to spend 10-15 hours / week commuting to sf? So strange. There's only one possible explanation: engineering shortage!