Conventions in Town - Need Website

Does anyone have a good website that has a comprehensive list of conventions (and hotel location) in Las Vegas?

I am trying to time my booking for when it looks like there is some good vacancy available.

Thanks!

Conventions in Town - Need Website

lvcva.com/meetings/convention-calendar.jsp

Give date information only for details of all events and all venues.

Conventions in Town - Need Website

http://www.vegasrooms.com/conventions1.htm

Thanks!