If you are playing, you must join the IRC channel #screddit on irc.esper.net.

Visit SCReddit.com for more details:

The SCReddit Open is the official tournament for StarCraft Reddit community. Every week, up to 128 Redditors compete for money, prizes, and fame. Founded shortly after the launch of StarCraft II, the tournament has grown steadily each week into what it is today. For more information, visit the SCReddit website at http://screddit.com/.