okay, first you send your piece to Allyssa (she's boss of the Writer's Guild) then she sends it to a panel of readers who decide whether or not it is allowed in. Eventually, sombody posts it up there. Even me and Val and Allyssa herself go through this process, so it's totally fair.
Oh yeah, Allyssa is Allyssa@planet-tolkien.com in case you didn't know. Good luck and happy writing.