First let me give a brief description about
FUSE.A fuse is a web2.0 utility which allows group of users(community) to build important bookmarks around a topic of their interest.More explanation about FUSE can be found at
http://www.httpfuse.com/what_is_httpfuse.jsp .
How it be usefull for forums?
Owners of the forums can create the Fuse on the topic their users are discussing which will allow their users to put important bookmarks on that topic.
Now Owners can Just give the link of the fuse to their users OR the better way is to embed that fuse under that topic,which will allow user to see the important bookmarks on that topic on the forum itself.