Ask HN: Directory of all HN related projects?

I love all the HN related projects/sites that pop up so often. Things like http://www.hnvue.com/, http://hackernewsers.com/, http://hnofficehours.com/ and all the other great HN sites are awesome resources. They inspire me to start my own project to enhance the HN experience.

The only problem is every idea I come up with I always wonder if someone else has already done something similar. Is there an existing directory that lists all the HN sites? If there isn't would you benefit from me making it? I'd probably start with a google spreadsheet and then later build a site with categories/tags/voting/etc. so you can easily discover the best of the best.

Thanks!