I wrote to Zondervan several months ago, as well (January of this year). The first time I wrote was to ask if their NIV would be easy to navigate on a device without a touch screen, such as a Sony. I received a response from Melissa Liszewski stating that I would have to ask the manufacturer of the ebook reader, but that it should work fine as long as I got the epub version. When I bought my Pocket Pro I also bought Zondervan's NIV, and was disappointed to find it was terrible for Navigating. It really wasn't easy at all to select which book I wanted to go to. I wrote back and told them I was disappointed in how they set up the epub version of the book, and that it locked up my device each time I used it. I asked if I could have permission to break the DRM and reformat it for my own use. I figured the answer would be no, but I thought it wouldn't hurt to ask.
Unfortunately, they never even responded to that request. I sent that one mid-March. Needless to say, I have not been very impressed with Zondervan's customer service.