In reply to Brin Wilson.

RTL styles can be tricky, especially if you've never had to design a real site in RTL. It's hard for some people to wrap their brain around it if they've never had good exposure to an RTL language. There are some automated tools that help, but I find that they only really handle the most basic of things. My more recent themes have RTL styles (most older themes do not), but I've had very little feedback from the community on them.