Hm, I have never been on a Realms server, should be interesting. If you would like to invite me, my IGN would be Romo22. Thanks in advance.
EDIT: Definition of a Minecraft Realms for you. A realms server is one hosted by Mojang themselves. You must purchase a subscription for one, and it is purely Vanilla, although they are still in Beta testing and therefore have allowed random players to access a server.