Congrats.
The hardest part is usually getting started. If you aren't addicted to commuting to work now then you are very likely to be shortly.
I love my commute into the office and back home at night. It gives me a chance to really clear my head, separate from work issues and enjoy some peace and quiet before I arrive home.
Do you have multiple commute routes yet? I have three standard routes I use. There's the "Oops I'm late - get there fast route", "Enjoy the pavement - medium distance route" and my 45 minute route on technical singletrack riding alongside a river and through the woods route.
Commuting is fun!
~Jamie N
www.bicycletouring101.com