This sucks...straight from the horses mouth.
Thanks for writing and for the suggestion.
We've been developing for different kinds of mobile platforms for a couple of years now and it's become clear over time that as a small company with modest engineering resources we should focus on developing for major smartphone platforms from here on out. We're specifically looking for platforms that offer a clear path for development and certification, a strong likelihood of being able to re-use our code, and a robust platform lifespan.
That means it's not likely we'll have the resources to pursue developing for your preferred device in the foreseeable future. I understand that may be somewhat disappointing, but we'd rather be honest with you now at the outset rather than disappoint you more deeply later on.
If having Pandora on the Go is a key feature for you, perhaps when it's time to upgrade you'll consider one of the ever-expanding options that do support Pandora? http://www.pandora.com/on-the-go
Thanks again for writing.
Pandora Listener Support