There are numurous ways to participate (and potentially profit) in the development of bitcoin. From a business idea to a B.I.P. (bitcoin improvement proposal) to a blog, there is a lot of opportunity in this emerging technology.
Whether open source, for profit, or for personal satisfaction any idea can be the seed of something bigger or a source of fun and excitement. We can be a part of the shift in the financial paradigm.
So if you have an idea, or need an idea, whether for yourself or for the group, then this can be the starting point.
Brainstorming is likely to occur so bring your thinking gear and an open mind :D