Verizon selects LTE technology for 4G0
Trials are expected to begin in 2008, but it is unclear as to how long it will take before LTE is available nationally. Not to mention that current devices will not be able to access the faster next-gen network. We would expect that future devices from Verizon would be compatible with CDMA2000, EVDO, and LTE; for them to offer full data compatibility across the US' network.
source: Verizon Wireless