I don't know of such a tutorial, Tony, but I would definitely be interested in helping create one. I've been using mercurial with a few of my sites for a few months now, and it's been working out great. There are still a lot of features I don't use, but as a fellow solo developer I'd be happy to share my workflow and the tips I've discovered if you'd find that helpful. 

I've installed the Mercurial extension in Trac, which puts a pretty web-based GUI on each of my sites' repositories, and lets me compare before and after changes side-by-side, and even keeps track of project goals and even includes a project-based wiki.

I love TextMate, and pretty much live in it while I'm working, but I use the command line to issue Mercurial commands. It's probably just me, but I find that more flexible and easier to use than the Mercurial Bundle. No a big deal, since I need to ssh to the web server to issue the hg update command anyway.

Feel free to email me directly, so as to not clutter up this mailing list.

Cheers,

- Dave