Hi,
for those interested, I've updated monotone-viz[1] to support
changesets. Monotone-viz is a GTK+/GnomeCanvas application for
visualizing and browsing monotone ancestry graphs. It uses the program
`dot' from the Graphviz package.
So now, when one clicks on a node in the graph, it displays the certs
attached to that revision and the changesets of the incoming edges. It
also verifies the certs signatures. And when you right-click on a node
you can view the output of monotone diff.
[1] http://oandrieu.nerim.net/monotone-viz/