I read plenty.
Sprint's LTE network is still in the testing phase in a few select cities with no devices or subscribers on it.
The only live 4G network they have is WiMax.
Sprint will be deploying TD-LTE, so no cross compatibility with Verizon or AT&T devices. (yes, AT&T and Verizon's LTE networks are actually compatible from a radio chip-set and antenna perspective, it's only a programming change in the radio)
Some people will be lucky to get on their re-purposed 800Mhz band once they kill of their iDen network. Should have good building penetration with that band.
Most users will be stuck on the 1900Mhz or 2500Mhz bands.