embed topics?

I know it is possible to embed a single story in the navigation bar. It would also be very useful to embed a topic and define the number of stories that are shown on the frontpage. By that, one can have some kind of "second weblog" on the frontpage to post a thumbnailed photolog or something. Perhaps this is not the right place, but it's just a suggestion (I know it's always easy to suggest things without knowing anything about the effort).