HTC has released the kernel source for the EVO Design 4G, and its US Cellular cousin, the HTC Hero S. The specific version is 2.6.35 for Gingerbread, which is the current kernel running on the devices. Having kernel source opens up some ridiculously cool mods and hacks, and the development community should have plenty of fun with this. This means that we'll all be having fun shortly after. If you're an interested developer, hit the link below and grab some code.
Source: HTC Developers