Just as an aside...article in the WSJ today - the demand for mobile data has been doubling every year (mostly adoption/sales growth). The FCC estimates the demand for spectrum will exceed supply by 2013!
So there you have it.
Honestly I agree with the elimination of the unlimited (don't shoot me people). I like the shared data option, but they need to really work on the cost per GB. I mean data usage has gone way up per device, your eliminating an unlimited for $30 that could be 5-10-50? GB so be reasonable with the per GB cost.
IMO the cost per GB will make or break this deal! Oh and if enough people start jumping ship, trust me they will notice! I estimate that in 10+ years with Verizon I have paid them over $10,000. Wow, in perspective that is a lot of money, I could have been making car payments!