I want to use a public Trello board as a public suggestion box. Optimally, I'd include the link in a blog post in the header of my website, and I'd ask users to "add a card" for each unique suggestion.
Unfortunately, at the moment it appears Trello users (who are not members of a board) cannot create cards on public boards. They can only comment on cards themselves.
Is there any way around this? Is there any way to allow all Trello users to create cards on a public Trello board?
Facing this same problem, I've wrote @welcomebot, a bot that pulls people into the Board whenever they comment on a card in which @welcomebot is added, so they can create cards and do all the things normal members can do.
Besides that, there's also http://boardthreads.com/, that let's anyone create cards through an email or POST request. Not exactly specific for the use-case you want, but it can work.