After hours of trolling the internet, reading differently worded articles from many sites, it seems that Sprint will keep and maintain existing WiMax networks, but not build anymore. That means if you don't currently have 4G, don't be expecting it to show up unless you buy a new LTE phone in 2012.
Im not trying to correct any one, this is just how I take it.
If anyone has proof to show me that Sprint IS going to expand the current WiMax, please correct me. I live in phoenix and there only 4 towers here.