Originally Posted by CPW
I commuted from PB to SDSU for some time on a steel touring bike. I liked the comfort of steel and the geometry of the touring bike was very stable if a little boring. I don't think you could do much bettter for commuting. If your budget is high and you have a safe place for the bike at both ends, look at something upscale like a Rivendell Atlantis. If you need a more budget minded bike, consider the Surly LHT though you should be prepared for a build (sold as frame/fork only). If you really need a lower budget, find a bike w/ touring geometry that fits and w/ the right tires, you'll be fine.
CPW
That is an awesome commute! Maybe a touring bike is the way to go. I'll be able to keep the bike inside at both ends so it will be in a safe place. Did you use many secluded bike trails to get their or mostly ride in busy traffic?