I'd wait it out too if I had purchased the lifetime pass instead of one time passes for a specific trip. The lifetime pass for a hundred twenty five bucks could end up being a great deal if they open and stay open a while.
In terms of their current status, I just saw a plan review of the Zip Line from the Las Vegas Department of Building and Fire Prevention Bureau dated January 21, 2014. The review had 30 items that needed to be addressed before the plan review could continue. Some of the items seemed like pretty simple corrections to documentation while others looked to be significant additional analysis required...like documentation and testing of the air braking system or finalizing evacuation procedures and equipment and having the Las Vegas Fire and Rescue and the Las Vegas Fire Department certify the ride is evacuatable.
Also, many point to the fact that there is no line strung between the buildings as an indication that it's nowhere close to completion. Still, they are having a job fair shortly and claim to be opening in March.
Now back in December, Joe said that "While the ride has been constructed and is in place, we have not been issued our ride permit by the Clark County Building Department in order to operate the zipline. They are the governing body for all rides in Clark County and unfortunately we will not get our ride permit until sometime in January."
I don't know how the 'ride can be in place' if there is no line to zip on. Maybe the final assembly is the easy part of it. Just lift the cable up 50 stories and attach it to all of your pre-staged mountings and turn the thing on. The engineering and approval process looks like a nightmare...as well it should be on an amusement ride where there is the distinct possibility of death if they forgot something important.
I'm so sure it will be opened by my next December trip with my gambling buddies, we've already got 5 nights at the Rio comped. It will be our home base for the trip.