As someone who wants a small project to try out a new framework, this seems like a great site to find projects.
It might be helpful to have users flag tasks that they are working on, so that others can get a sense of how many people are currently working on an answer.
Perhaps allow partial answers?
I have seen this happen often with StackOverflow. Were a person gives a one line answer to start things off, and then within 30 minutes elaborates the answer to a very detailed one.