I would create a separate blog and set a monthly theme - for example Identity for this month - then anyone who has thoughts concerning the given subject can drop them into a Comments box: thoughts that are 'outside the box' - original ideas, questions, observations or intuitions rather than received opinions. This would be neither a chat-room or a literary project but only a collection of individual cogitations about specific philosophical issues.
The entire contents of a month's Box would be posted on one page at the end of the month, each entry signed by its author (if they wish, or anonymous if they prefer). I might add illustrations for each theme. After a year, if the contents of the Outside The Box Box are sufficiently interesting, we could think about publishing it as a book via print-on-demand and distributing it via the internet and/or any other way.