The HTC blog has a post from its Director of User Experience about how they redefined the HTC Sense, and did so via user research.  He doesn’t elaborate a lot on what research they did, but rather their key learnings and how that informed all of the design decisions that they made.

My little researcher heart goes pitter-patter when I hear of stories like this, of companies willing to step back and completely reconsider everything based on user research.  Go HTC!