A new forum under "Tests and Examples" category for testing RTL support would be nice. If I remember it correctly, we can set languages for specific forums. A dummy language, say Arabic (with direction property set to RTL) can be applied to that forum. I said dummy language, because phrases may not be translated to actual Arabic. Although, it wont be perfect testing environment without an actual RTL language phrase, but, it will make sense for all members in the community as well as developers.