We've done this web can thing for the past two years with the help of the people at PCB007.com.
It is a great tool for those who can't attend the show (our own people as well as our customers and partners). In my case, I am back at HQ but still enjoying the awesome work that Anita Brown has done with our exhibit.
By the way, I think that INDIUM CORPORATION was the first company to have a live trade show web cam in our industry. It happened at Mexitronica 2006. Let me know if I am making an error. Just like this web cam, our Mexitronica cam came about due to the good people at PCB007.com.