We just created a mycyclinglog.com group to track our mileage (the site was created and is run by my friend). I find it really helps my motivation when I see others in my groups biking. It would be nice if our group members joined it. It takes less than two minutes to enter your data as you only need to input the date and mileage. Also, there's other fields to track your workout such as heart rate, cadence, etc.

After signing up, click on this link to join the United Velo group: