Here's the Arkham Sanitarium logo, at least for now. I'm still not altogether happy with it, but I've reached the stage where the more I fiddle with it the more frustrated I get. That's usually the sign to call it quits for a while.
Just click on any of the pictures below to get the high resolution versions. I've included four different color schemes for you to choose from, but the last one is my personal favorite.
Update: Of course, as soon as I finished posting this my significant other points out a suggestion from a commenter that would help me fix what I don't like. I still want to walk away from it for a few days to get some perspective, but I'll post the tweaked version sometime next week.