My nephew's flight to Las Vegas last night was canceled due to the snow storm and he is currently waiting at his gate for the next flight to Vegas. It occurred to me that with the new iPhone 3G and other similar devices, you can use other more reliable websites to predict or estimate your flight status rather than relying on the TV monitor at the airport gate as your sole source. I'm sure many of us have waited patiently at an airline gate and not trusted the information provided by the airlines and wanted more detailed information so that we can make possible alternative travel plans.
For flights delayed due to the Las Vegas Snow Storm, here's some sites that I found.
FAA Airport Information - provides overall airport conditions status.
Las Vegas Airport Information - provides a list of upcoming flight arrivals and departures.