I want to post up my rules and get some feedback on them because I noticed a lot of people look at the rules as one of their 'to join or not to join' points. Would this go under Managing your Rpg or... the only other place I could think of was the Writing Showcase, just because that's where people can post plots for feedback, but I really wasn't sure.
I would say writing showcase because it is something you've written. :p But it's not really up to me is it?
No that would go to the Managing your RPG. It's part of your RPG, the writing showcase is for stories, fanfics, one-shots etc that aren't always related to RP'ing.
As long as there are no links in the rules you are free to post them in the Managing your RPG forum to get feedback.