Last Updated: June 2nd, 2014
If you are unfamiliar with rooting or ROMs, you can check out our primers here, because we're going to talk about it:
User lalexi over at xda-developers just posted a link to HTC's official release of the Desire's kernel source code. This is very good news for the development community because, as it stands, developers have to simply patch bugs that occur when trying to overclock the processor and getting things to work, sometimes incompletely, trial-and-error style.
Last Updated: August 1st, 2012
CyanogenMod 6 is one of the most popular Android custom ROMs, and for a good reason - besides supporting a myriad of devices, it is built from AOSP (Android Open Source Project), which means no extra garbage that normally comes installed by carriers and customizations/improvements for the people, by the people (the CM contributor community is huge).
Sprint has abandoned our beloved HTC Hero (it was my first Android device a bit under a year ago now and holds a special place in my heart) but the Android community hasn't.