Of course. Ideas should be free.

All I did for my little plugin was to attach an optional offsite url.

If filled in, two things happen:

* If the singular form of the post is requested directly, the user is redirected to the url provided
* If an archive type page draws the post in question, the title (and read more link, if used) links to the offsite url specified.

I later adjusted it to remove the second item as it was redundant. Now, any request for the singular display will redirect to the offsite url.

Super simple, but very effective.