Thanks for the recommendation. Trello does seem like a more promising candidate for the features. As you mentioned, GitHub's system is nice. Ideally what I had

Thanks for the recommendation. Trello does seem like a more promising candidate for the features. As you mentioned, GitHub's system is nice. Ideally what I had in mind was basically GitHub's issue tracker standing on its own (Code, Wiki, etc. all stripped away), and preferably being able to run it internally.