WOTM = Writer of the Month

Basically, it's a contest the Guild used to have (It's alongside something similar is currently being worked on being revived however) where they would submit pieces of writing according to certain rules and themes. It was mainly a competition, but one where many people came to get the insight and advice of judges, contestants and audience members.

Someone who actually had taken part in or ran it though back on the Old Guild would be able to describe it better than I can.