Is this possible - View subforum threads with category?

[boywonder]

I was wondering if this is possible - or if there are any hacks available for this:

What I want to do is have a Category, which shows all the threads of its subforums.

You cant post a new thread in the actually category itself (you have to go to a subforum to post a new thread), but when posted in the appropriate subforum this thread will show up in the Category, and the Subforum.

Any ideas would be appreciated.

Thanks