Head to www.loltournaments.com and create an account. Then click on the "tournaments" header. From their register your team, we will ask you for the email addresses of your teammates. At this point your team will need to register with us and confirm to be added to your team!
Note that until at least 4 teammates register your team is still in pending mode. We do this to ensure each team that signs up has a committed roster and that there are fewer "byes" on the first day of scheduled matches. Since we have been running tournaments this way we have had very few "byes", matches have been starting on time etc. I apologize for any inconvenience, this is the best way we have found to set tournaments up!