Roadstergal
Sergeant Jackrum
I'm in the same situation as Phenom. I recently started a job that's 9 miles from my house. I've got a 29er mtb, and I was thinking of either getting an extra set of wheels and putting slicks on them or getting a road bike.
I'll go the other direction of the experts and say to put slicks on your current wheels. A tire swap takes 10min. For 9 miles, the bike isn't making any kind of difference.
Actually - if you have disc brakes, I have a set of new wheels with a disc and cassette on the rear already that I'll sell you for cheap.