I saw this thread was from '09 and was glad when I jumped to the end to see you're still around and still commuting. Now, I'm about the same age you were when you started this thread and I'm really into using my bike as a car replacement whenever possible. My commute is only 4 miles/day, so not much, but I still feel more energetic on those bike commuting days. I end up getting a lot more miles by running errands and shopping on the bikes.

By the way, I'll be visiting Boulder in mid-June this year. Taking a road trip with my 12 year old daughter and I read that Boulder is one of the top bike-friendly cities in the country, so we're spending a day or two there just to check it out. We'll pack our two folding eBikes. I'm a little afraid of all the climbing there might be, as I'm from the flatlands. Can you give me some good routes to look into? Maybe recommend a map or share some GPX or FIT files with me?