The first League for 2012 will run from April 12th (with a kickoff meeting that night) through May 26th.
You can signup now, $5 per entry towards kit and prizes.
All the Gnarls League info is here:
The only real House Rule is a maximum of 3 Games per week.
There's no set league night, sorry, but Wed, Thurs, and Saturdays are usually when I will try to show.