I've attended GenCon for the past 5 years. Although the convention officially begins on Thursday, I've always had a great time playing in RPG events that have been offered on Wednesday evening. I'm not sure what happened last year but it was a big let-down on Wednesday evening. There were none of the normal (meaning 4-6 player) RPG events offered as there had been those previous 4 years. Perhaps it had something to do with the convention being held earlier than normal?
I'm really hoping that there will be some of these events offered this year! It makes getting into town on Wednesday that much more fun.