Plugin request

Does someone fancy knocking up a plugin for me ? I had an idea that i would find handy but cant php’it. I would like a tick box on the Write Post page that said “DO NOT APPEAR ON INDEX PAGE”. The default would be unticked, but if the user ticked it then the post would appear in its categories but NOT on the index page.

Of course there would need to be a mod to either the_content, the_excerpt or the The Loop itself.

Olly