Thinking about doing some promotion for your RPG? Here is some of the sites that have featured Portas Aurora: Arrival. Even if you are only looking for possible RPGs to play then this list maybe helpful too.

http://www.enworld.org/
http://gamebanshee.com
http://rpgkickstarters.tumblr.com/

There are also a few forums that RPG fans like and I have seen some traffic from.
http://forum.rpg.net/
http://crowdfundingforum.com - This one is more generally targeted, but there is a strong group of RPG fans that look here for upcoming games.
http://gog.com - Has a great community.

If you are looking to do a Kickstarter Project there is a few more sites that you may want to look at I have gotten a bit of traffic from each of them.

http://gaming.wikia....ckstarter_Games
rockpapershotgun.com - Katchup

If there are anymore sites that people can or should use you can drop them in the comments and I will add them.
Hope this helps a few people.

Edit: Added the forums to the list.