I set up a Google alert a while back to send me links to web pages that are related to homebrewing. There was one link that had a subject of reusing hops. Here’s the link:
http://beeradvocate.com/forum/read/1898207

In this post, the author details how he reused hops to bitter a beer that were used to dry hop a previous beer. The facinating aspect of his experiment was that he used pellet hops.

Has anyone else tried this? If you have a BA login, you can read more.