Email me at
[email protected] to sign up for next season's league tournament. I need to check over the status of each league level. A league just got done, but I'm sure there are a few still going. It might be best to wait until September when everyone is back from various Summer activities.
Also, the following link takes you to the same place as the link goldfinger gave above, but is a bit easier to remember:
http://tournaments.webdiplomacy.net/
The Masters is just starting the 6th out of 8 games so has several more months to go, but you can email that tourney's director to get added as a replacement player.