Last night on my way home from a bike maintenance 101 class at my bike shop, I broke a rear spoke!

That is the second one in 5 days. The guys at the bike shop said I should replace my rear wheel with a double wall rim and go to 36 spokes.
Other than the spoke issues (which have all happened during errand trips to my LBS), week 3 of my commuting to work has been great. I have only missed one day of commuting since starting 3 weeks ago. Today was on my backup mountain bike. MAN, what a difference slick 700c tires make in your ride. My 26 inch mtb knobs felt like I was clawing through the streets to get to work. All in all, it only added a couple of minutes to my commute.
I hope the expense of a new rear wheel won't be too bad. I commute everywhere now (dentist visit, after work dinners with family, errands, shopping, etc). I have a greater appreciation of my road bike after this morning's commute!