Looks like the Evo Shift 4G name's gonna stick for that upcoming Sprint horizontal slider, as accessories baring its name are beginning to roll into Best Buy. (So much for Knight and Speedy, we guess.) We're told Jan. 9 is to be the release date, which makes since if we see an announcement at CES the week before. Note that this likely isn't part of that whole "The first to 4G, again" campaign that's been started, as that's going to belong Verizon and the LTE-enabled Thunderbolt.
Also, Android Police scored pricing info -- looks like it'll be $150 on contract and $549 outright. We'll see soon enough.