My usual command-line for checking through the repositories I have for
unmerged patches is like this:

mr -j 10 fet ; mr -i up ; mr vis

The order of repositories is always the same and I have usually have
time constraints so I don't end up getting through all the repos. Then
next time I run the commands, I start from the beginning again. As a
result I hardly ever review stuff that sorts toward the end. It would be
nice to either have a way to pause and resume a run, or to just have a
way to process the repo list randomly.

BTW, my mr vis subcommand is an alias for these:

cvs_vis = cvs -q diff | scite - & bash -i
svn_vis = svn status | scite - & bash -i
git_svn_vis = gitk --all & git status ; bash -i
git_vis = gitk --all & git status ; bash -i
bzr_vis = bzr visualize & bzr status ; bash -i
hg_vis = hg view & hg status ; bash -i