The only thing I'm personally not sure of is how to implement the feedback process and systems. Comments in e.g. WP are more amenable to reviews (e.g. "love this app!"), not so much to bug reporting or tracking. One thought was to have a full sub-forum or even just a single discussion thread for each app in the forum and just link from the app's directory entry. That gives us the full capability of the forums for formatting, discussion, etc. I don't think a formal bug tracker is needed for 90% of the software that will be listed. The rest can use our existing Redmine setup that devs have access to. The question remains though whether a simple "commenting" functionality is enough, or if we should continue to rely on the forums for at least the major part of the actual *discussion*.
My idea was to disable the built-in WP commenting system and direct any discussions on any app to the original forum threads. My desire was to keep all discussions where they are now and not split them between the forum and the directory.
Furthermore, by doing it this way, there would be no chance of spam in the directory, no useless "nice app" comments, and only one place for a developer to have to subscribe to keep up to date with new comments (the forum thread)
Providing the forum links in the PAD files, as well as links to the author's profile, and donate links, would be a good use of the extensions that Renegade spoke of here
I did want to provide some way for users to give a little non-text feedback, without having to register on the forum. I figured I'd do that with a star rating system. It seems to be working out pretty good on my book directory. People that wouldn't consider taking the time to register or write a comment can just click a star and go about their lives.
With the additional exposure a directory may bring, some of the old "publish & forget" days may be coming to an end. Since most of them do this for free and in their spare time, it may get to be a "job" staying on top of the comments. Especially if a title gets popular due to wider exposure and generates a lot of feedback asking for responses from the author.
I had thought about this, and part of the reason for the directory is to give all the forgotten gems on the forum the exposure they deserve.
I think every author posted their apps knowing there was a chance it could become popular. But if responding to users becomes too much of a chore for any developer, all they would have to do is let us know and we can either take advantage of the fact that we have a whole community here and pitch in, helping with answering questions (like we have been doing for Skrommel's stuff, while he has been away building his new house), or make a note in the directory listing that the app is no longer supported (in extreme cases).