I installed LibX a while ago to see what it is like. Every now and again it pops up an icon - what it calls a 'cue' - on a page where it thinks it is appropriate to link to Virginia Tech resources (it can be adapted to link to resources at other institutions). Quite nifty really, especially if I were a member of the VT constituency.
A little while ago I was looking through RSS feeds (I use the Firefox extension Sage), and lo and behold I saw the VT cue in several places on the feed from Qu�dam cuiusdam, Peter Binkley's blog.
Peter has embedded Coins in his pages. LibX recognizes the Coins and acts on them to bring the user into the VT resolver and onwards to the catalog.
Magic .... This is a nice illustration of something still quite new.