A feature in Guvnor 5 that might not be obvious is atom feeds (like RSS feeds) for different things: specifically Category listings, and package listings. Using a feed reader of your choice (below is NetNewsWire) you can “listen” for changes to assets (each change will result in a new item in a feed, effectively). Opening it in a web browser will open just that item…
Handy for being notified of changes… the icon is the feed icon on list screens (paste that URL into a feed reader). It is an authenticated feed of course….