I am curious on when will LTE equipment be available in the US?
I think it's already done, LTE equipments deployed by Verizon ...
at least AT&T, Verizon, MetroPCS, and Sprint (sorry, if I missed some) provide LTE service in the US.
LTE-capable devices are available from several device manufacturers (e.g. Apple, Samsung, Motorola, LG, Pantech, HTC, Nokia and probably several others aswell to choose from).