I don't see why some stupid cellphone bill calculator website should cost tens of thousands of dollars, and I also don't see why private citizens can create a website like that themselves if they want to.
It is bad that the industry was able to kibosh it, however really if you're not able to figure out what your cell phone bill is going to be, then really you shouldn't even buy one.
The one way I think the government should get involved with cellphones is to somehow make cheap 3G wireless VOIP an option for people. I don't think it would take up much of the spectrum at all, and would be a huge benefit to everyone. It would give everyone unlimited cellphone use for under $20/month including long distance North America wide. The only thing stopping this is greed.