I just maintain such a list on my website: http://www.nateeag.com/software/ideas.html I haven't tried to publicize it at all (well, until this post). Start the list on a website somewhere, and if you want people to look at it, submit it to HN, Reddit, et al. That should give you everything you need. Not everything needs to be a platform.
> Not everything needs to be a platform I couldn't agree more. I was thinking about a github repo so people can contribute via pull requests. I should have put more emphasis on the fun part and how I don't want it to be a Business Ideas™ because that goes against the spirit of my original goal. I also like your list. Maybe I should put my list on my website as well. Thanks for sharing.
The whole site is just a static thing whose code and content lives on GitHub: https://github.com/NateEag/nateeag.com
Good luck putting yours together!