HTC Offers Android 4.0 Kernel for Several Smartphones
HTC has released the source Android 4.0 Ice Cream Sandwich kernel for the Vivid, Sensation, and Sensation XE. HTC began rolling the Android 4.0 update to these three devices recently, and the kernel will help developers adjust their apps/services to work better on these phones. The code can be downloaded from HTC's developer web site.
Third party ROMs.
I appreciate how bold HTC is being in allowing full access to their phones.