On our neighboring Ormewood board the idea of finding a tool for organizing volunteers is being talked about as a way to make it easy for neighbors to see projects being worked on by the community. I like this idea, and have been doing a little research as to what might work best.
One site proposed was
http://www.volunteerspot.com/ which has possibilities but it is calendar based. It allows for people to view needs by days so if you had a clean-up scheduled on November 16 you could easily sign-up. This could work if you laid out all projects that need to be done on one day of the month. However, what wasn't completed would then have to be reentered for the following month. This could be a way for an organizer to see what has or hasn't been done, but will create the extra work of cutting and pasting to the following month.
I suppose you could trick this to working if you put beautification items on the 1st, public safety on the second, etc. until you listed out all projects that need work. However, is there something similar to this that isn't date specific, maybe more project oriented? This way people could pull it up and easily see which projects are needing work.