Las Vegas folks, this is what you are looking for:
The Alcatel Lucent Antennas are circled in red! This pic was taken from the tower at Tropicana and Eastern.
If you see any other towers in the Vegas area with these antennas, post pics and the closest cross streets.
And for those that want to become Sponsors to find out which towers have received build permits and where they are located, the link is here.