Good for you! All the best. I think the main link for the project is here - http://www.30daysofbiking.com/ - I am planning on doing the September one. It's a great idea doing shorter errands by bike rather than car, as those journeys are the most inefficient and uneconomic ones to do in a motor vehicle.

Slightly o/t - as I couldn't do the 30 days of riding challenge this month I'm instead logging and blogging all my journeys for 30 days - where, how, how much, how efficient, how happy they made me and so on. I'm barely a week in and it's already interesting.