Very helpful article explaining many of the costs to take into consideration if your company is thinking about exhibiting at a trade show. While this specific example is for Macworld Expo at Moscone Center in San Francisco (which is a somewhat expensive city), many of the costs are similar at other major convention halls. The cost that floored me the first time was Internet access. At the most recent Macworld I think it was $1095. I remember, the first time this cost blew me away was at COMDEX 96, and it was $2,000 if I remember correctly.