The post is called "5 Reasons Why I’m Thinking About Quitting The Tradeshow Business," and my guess is that you'll be able to commiserate with Tim on all five:
1. High speed Internet costs
3. The Pay to Play Mentality (hopefully this isn't a big issue at association shows, but I have seen it so I know it happens there, too)
4. Room Blocks & Attrition
5. Lack of Control Over The Customer Experience
Tim, who organizes the New Media Expo, also offers a solution to each of these five points. Go read his post and let him know what you think. I think it's people like Tim, and you, who can help solve these longstanding issues if you can bear it in the meantime.