Someone earlier in the thread said "If it was made free, and included a small ad banner at the bottom, I'd be happy to download".
I will always pay for apps to avoid small ad banners! I don't mind paying at all for a clean non add supported user interface.
On an associated topic, hopefully you won't mind paying a premium once AT&T starts charging bandwidth hogs their fair share. I am not using that term personally toward you - it is just a common term for a heavy user. If a device and network allows people to listen streaming dead air for hours on end, that is a good thing, as long as normal users don't have to subsidize it.