I've been using MarsEdit for a while now, and find it very pleasant to use for updating Movable Type and WordPress blogs -- much nicer than navigating through web interfaces. I also have a LiveJournal, however, and while it would be nice not to have to launch a separate client to maintain it, somewhat to my surprise, MarsEdit's support for LJ is pretty bare-bones.
Personally, I never use the "tags", "music", or "mood" options on my posts (though of course many do), but I do tune my user picture on a per-post basis, and I would like to be able to post to any of the communities of which I'm a member. Then there are the post security options; again, I generally don't use them, but others use them heavily.
Of course, there are myriad full-featured LiveJournal clients already available for no cost, and chances are slim that anyone would buy MarsEdit just for LJ, but are there any plans to broaden MarsEdit's support for LJ so that those who do purchase it don't have to wrangle two blog clients?
Thanks for a great product!