If you're looking for a stake, you should start in the
Offering Stakes forum.
If you can't find what you're looking for there, you can create your own thread looking for a stake, or selling shares of your action in a tournament:
Seeking Stakes
Selling Shares - Online
Selling Shares - Live
And if you've sold shares for a tournament, and are now playing and want to provide updates, you should do so in a new thread here:
Staking Rails