Pricing and services:
Big list of their options and services in this PDF:
While the Tropicana is one of the most boring looking properties on the strip, okay, it is the most boring looking property with its 100% blank white towers, inside it actually looks much more attractive. They have three chapel options; an indoor "Island Chapel" that seats 76, their semi-outdoor Island Arbor for 30 guests and their outdoor courtyard for 70 guests. All their options are fairly casual so keep that in mind; could be what you're looking for, or maybe not.
Additional info I've been given in summer 2012 is that their wedding coordinators are pretty open to letting you customize the decor, including yourself as long as you have someone to both put things up and take them down, or you can hire their staff to do it. You can also bring your own bouquets if desired.
They do have one huge red flag; unfortunately, just like many of the other large strip resorts, they're in bed with Cashman Photography so if you get married in their chapel, or one of the outside venues, you're going to be forced to use Cashman for your photos. As of June 2012, I've been told they do not have the option to pay an outside vendor fee to bring in your own photographer.
People who have used this vendor (sorted by date) and link to the review:
TK threads mentioning this vendor:
These are some pictures from another knottie provided by the Tropicana wedding coordinator. Will try to accumulate more as soon as I can.
Here are some more of the Arbor wedding option: