I love this idea! I’m currently in Tarren Mill where we have a small sub-section dedicated to the Cult of the Forgotten Shadow. I haven’t had the chance to do any RP with the guild yet, but once Keoni Darrow is an established member of the Cult, I’d be very keen to see this circle of magic take shape!
Back when I was really active in my old server’s RP community, I used to host events centred around the established holidays, to promote cool RP stuff outside of the big guilds. Speaking of guild, I was also involved in the creation of something we called the Union Accord. Essentially, it was designed as a council of all the big guilds, so we could work on large-scale events together. It grew to be pretty damn cool. Of course, for something like that have a chance to succeed, you first need established guilds to create it. It’s a long term goal, I guess you could say =)