It looks like we are now able to get some pieces that will be of use in Las Vegas. By clicking on the Las Vegas Loot Event posts on your Facebook wall, you can get a bonus item.
If you do not know what I am talking about, you are looking for a post that looks like this:
Which you can find on your news feed (click "most recent" to see the newest posts). When you click on "Claim your Vegas Reward" you can get an item, like a Magnetic Lock:
The items I have seen so far I have only been able to get Magnetic Locks, but others have reported finding a Deposit Box, Magnetic Lock, Reinforced Steel, Security Camera and Motion Detector.
In the end, once Vegas comes out, it looks like we will be able to build a "Casino Vault". I suspect the Casino Vault is the solution to the whole cash conundrum - that is, how they are going to introduce a new currency in Vegas that will be somehow different from New York money.
Also, we can be certain that this will ultimately be part of the new "upgradeable casino" that players will be able to own, build, and customize in Las Vegas.
I'm guessing we will get something like Poker Chips as our Las Vegas "money", which will be lootable during fights unless it is kept in this Casino Vault. Just a theory though, will have to see. I figure we will want them, so be sure to stock up on these items!