Stephen,
> Please comment, update the wiki, let us know you're interested in this..
I blogged about this some time ago. One issue I can see is that I
believe that the RLS which many users want is different from the RLS
which SEPostgres implements.
Links:
http://it.toolbox.com/blogs/database-soup/thinking-about-row-level-security-part-1-30732
http://it.toolbox.com/blogs/database-soup/thinking-about-row-level-security-part-2-30757
--Josh Berkus