If you decide to go for an event based website, you should try to maximize the effectiveness of it. You have to make sure people are actually referring and using it. Otherwise creating it will end up as a waste of time, effort and money. Also in terms of web design and development you can build up the event website as a separate one or have it is as a Microsite within your companies’ main website. There are some important issues that you should surely consider otherwise you may end up creating just another website that nobody will look at.