I'm requesting this plugin to be added to the 1.7.2 survival server
I've used a chair plugin before and it added a very nice effect to the server
I know it would be REALLY annoying to sit in a stair every time you accidentally right click, but this chair plugin allows the option to only sit in stairs that have signs on the sides.
http://dev.bukkit.org/bukkit-plugins/chairsreloaded/