I started commuting a couple years ago and took a break for a while for miscellaneous reasons. Started up again this past April with a Schwinn Cimarron. I decided to take the plunge and invest in a new commuter which I picked up last Thursday. My daily commute is 7.5 miles each way.
2011 Giant Cypress:
I've put about 40 miles on it so far and it has been by far the best riding bike I've owned yet.
Added a sunlite rear rack and a Co2 inflation and patch kit