TR Diamond Perks in Vegas

I recently became a diamond member at CET, and I happen to be going to Vegas next weekend.

What can I take advantage of as a Diamond member in Vegas?

they have a fairly comprehensive list on their website. some that I can think of off the top of my head:

Separate check in
Lines for Diamond only or Diamond and Platinum at Cashiers, Buffets
Diamond lines at some of the cab stands ( a favorite of mine)
Diamond Lounge access (hours are pretty limited in Vegas though)
there are show tix (some 2 free, some 2 for 1) available for Diamond
you used to be able to, with the Diamond card, go to Voodoo lounge at the top of the Rio with no cover, no wait in line. I think you still can
I have gotten into Pure at Caesars with no cover using a Diamond card. I don't think that is a usual thing though

Where are the lounges? What's there?

All of the casinos have one except for IP. You can have free drinks in there and very limited appetizers. As a Diamond member you can bring in one guest. Harrah's is on the second floor. Paris is by the elevators, Rio is in the high limit room, Flamingo's you pass on the way to the Buffet. Planet Hollywood is also on second floor. I can't remember where Caesar's is. It's a place to relax and drink for free w/o gambling (you've done enough of that to get to this level). Have fun!

Caesar's DL, my favorite, is located in the Augustus Tower near the Flamingo entrance.

Congratulations on reaching Diamond!!!!!

It's fun getting to use those express lines at buffets and cashier cage.