I find CES pretty cool although the last one I attended with CES 2006 (I think). It's great seeing all the new technology being showcased as well as representatives you can talk to from the big and small companies.
:P Sometimes, you can get free gear from some of the bigger companies depending on who you are and possibly the questions you asked. I had asked about Turion X2s which intrigued the AMD guy over there and he handed me a free AMD t-shirt. Talk about awesome.
Occasionally you find drawings or raffles here too that you are able to participate in. I haven't won anything yet but it's always possible.
When I went, the place was just CROWDED. There were so many people and it seemed like a fire hazard if there was a fire in the building at all. Sadly, I've heard that the recession has turned down several companies and people from visiting this year. Hopefully, we see a rise in visitors/companies for the future years to come.