Wicked X ROM also comes with its own theme, you will find nice touches to its beautifully-themed quick toggles, drop-down animations, and much more. And yes, Sprint hotspot works out of the box so you can tether your Sprint 4G LTE all day long no problem.
Overclocking? Yes, KTweaker kernel comes with overclocking support up to near 2.3Ghz, you can use KTweaker app to overclock. I recommend staying around 1.89Ghz at most though, otherwise your phone may get super-hot and battery life may be not as good. But at 1.89Ghz, I found that battery life is still excellent with great boost in overall performance of the phone.