Not sure how possible this is and I know there is not many other users that could use this, but I'd like the ability to embed a user control in a post.

A use case for this is the ability to make threads a discussion vehicle for just about ANY type of content.

For example say I have a user control to display a gallery of artists works. The initial post would have the embedded gallery and subsequent posts will allow the discussion about them.

As I'm typing this, I'm thinking that maybe it can be done via an enbdedded iFrame.... but still something to think about.