Y'ello, people!
Welcome! Make sure to spend some time with the Help page ;)
It hides a number of pretty cool tricks, especially in the section on RuBB, things that you might not know about simply by looking at the textbox editor.
When you get around to playing, check out "Wanted – Players" and find what you'd like to play.
When you get around to running something, try and make sure to check "Wanted – GMs" for any players who might be looking for something along the lines of what you're offering.
