Python pygtk based MergeTool for Mercurial

I've found a merge tool named gpyfm, which is a rewrite of the old TeamWare file merge tool used by Sun Engineers.

Excerpt from the Homepage: 

gpyfm was originally written by David Marker (assitant ON Nevada gatekeeper). Richard Lowe, one of the project leads for SCM Migration.

Here is a picture from the tutorial of the merge tool: