You mean like through scorehero?
Thats how the leagues got started (idea thought up by Javman and launched originally in the Rivalries forum), and Azurac is running an online single elimination thing right now too in timing with march madness.
Break out with your idea and drum up enough interest. This might go in Rivalries forum tho, i think Tournaments forum is more talking about face-to-face GH competitions.
_________________
Watching her, these things she said / "Time," she cried "failed to wait, this time"
***
Hush now / Let it go now / I know it's time to go / Time to let this fall / From my hands