I've added a list of the current bugs and proposed enhancements relating to this website to Github. If anyone comes across any problems with this site or has enhancements that they wish to suggest, please add them to the list. You just need a free Github account to contribute.
The site's source code is also available as example code.
I had considered sharing this list with only the admins here, but I might as well get feedback from the whole community. Hurray for open collaboration.