Yes, after logging in and going to the "Training Log" tab I select the "Add today's ride" button in the upper right. The screen that comes up has the words "Ride Entry" just below the tabs across the top of the page, directly beneath that is the form to enter the ride data and below that right next to the blue menu bar at the left and beneath the words "Ride Summary" (where you rate your ride from 1 - 10) is a button that says "Submit Entry"
I'm on a PC, and sometimes the site reacts slowly, but I just now logged my commuting miles for October using the above technique.
2003 Iceman Challenge - 2:34:55 - 897 / 2,000*
2002 Iceman Challenge - 2:39:23 - 1093 / 2,186
2000 Iceman Challenge - 2:49:18 - 1516 / 2,153