Aside from the 4G WiMax hotspot, one of the other cool new features of the Sprint Evo 4G is honest-to-goodness two-way video chat, with Qik serving it all up. And it worked fairly well in the demo. You can choose to stream video either from the 8MP rear camera, or the 1.3MP front-facing camera. And it works over all three of the Evo 4G's data options -- EVDO, WiMax or WiFi (though the later two definitely will give you better results thanks to their higher speeds).
Oh, and since you asked, this is part of what's included in that extra $10 Sprint is charging you. Check it all out after the break.