It worked for me (tm). It converted http://blog.asheesh.org/bin/blosxom.cgi to http://blogs.jhu.edu/~gooftroop. (Hopkins Weblogs currently runs LiveJournal.)
I know some people around here expressed an interest in a simple whatever-to-LiveJournal import client. The code I used to do this is quite simple, and it could easily be incorporated into Charm. For now, though, if someone wants to use it, email me at email@example.com. When I get another few minutes, I'll give this script a name and put it up on a web page.