I've put in fixes for the issues that John raised (thanks!) and posted a new webrev at http://cr.opensolaris.org/~kupfer/wx2hg/. There's also an updated man page at http://cr.opensolaris.org/~kupfer/wx2hg.1.pdf.
Rather than having wx2hg try to detect a failed conversion attempt, I changed it to print a reminder about "update -C" if it bails out with an error. (Of course, it only does that once the Mercurial workspace actually exists.) I'd like to squish the deltas and push the changes Tuesday next week. mike