I tend to think of a lot of things I'd like to write, but never get around to doing. I had this idea for a website to collect such half-baked ideas. I thought something where a group of people could, with as little overhead as possible, record an idea and maybe a 5 minute sketch in code, and other people could contribute either their comments, criticisms or code. A proto-sourceforge.
I even bought a domain "halfcoded.net" for the venture.
Unfortunately that idea ended up being vapourware too.