The Komodo kernel for AOSP Jelly Bean ROMs was updated for the HTC EVO 4G LTE yesterday and adds GPU overclocking in fast, faster, and crazy fast flavors.
The kernel also adds OTG USB host mode support which allows a mobile device to act as a host to USB devices such as keyboards, mice, flash drives, etc. Keep in mind, though, that a ROM has to have drivers and support for the mode to function.
If you’re running on of the few Jelly Bean ROMs that are available at the moment, and you’re wanting to try something new under the hood, the Komodo is probably your best (and only) bet at the moment.
If you’re flashing a kernel and you’re S-ON, make sure to keep a copy of a working kernel around just in case anything messes up. Also, make sure that you’re flashing on a Jelly Bean ROM, as this most likely will take an ICS ROM and do very bad things to it.