Welcome to the Forum!!! in addition to the Droid Discussions section (for all things Droid), there is also a subforum devoted to the LG Ally under the Verizon Android Phones section. You should be able to find as much info as you want; but it you can't, don't hesitate to post and ask questions!
there have been rumors floating around about LTE and the DX, but right now they're just that - rumors. only time will tell... take a walk over to the DX area - tons of info specific to the DX, including several subforums. a good place to feed your soon-to-be addiction.