Hi all
I didn't hear back from anyone regarding this module so I decided to give it a shot. Jeremy from CodeDonors.com installed it for us and it works great!
I don't have any affiliation with them, but thought I'd provide my experience as it might help others...
I couldn't find a good UPS shipping label plugin for ZenCart and this module filled that void. It incorporates with your account to provide list rates or account rates to your customers. You can markup the shipping as with any shipping module. However, the strong point of this shipping module is the label creation - and not having to copy/paste the shipping info into UPS!
Here are a few screenshots to give an idea of how it looks...

Settings Page

Label Creation
After creating and printing the label, there is an option to update the order status with the tracking information which is also very handy.