An updated version of the D2 was just released a few weeks ago and dubbed the D2+. Many of us where a bit puzzled as to the minimal changes made through out the firmware. Changes were made in the firmware adding BBE+ enhancement and new GUI with the psychical design being the biggest noticeable change. Though now we know that most of the internal components have remained unchanged thanks to a few industrious and enthusiastic D2 owners.
It turns out that the D2+ firmware can be brute forced onto the D2 with a tool developed by the Rockbox crew, TCCTool- originally used to load firmware on bricked Telechip based devices. The steps to do this can be found in the D2 forums- Martin has even updated his popular More Mono theme to the D2+ firmware.
Updating the design, giving it a firmware refresh, and calling it a D2+ is a great idea, but leaving old D2 users behind in the firmware refresh is another story. The Zune has already set the precedent for this when they still continue to update 2+ year old hardware with the same firmware as on the newest Zunes. So D2 fans become quite envious of the Zune and a bit abandoned Cowon. With that said, it would be honorable of them to go ahead and give the long time D2 owners the D2+ firmware upgrade without having to hack it. Hacks might cause an increase in support too.
Below are a few photos of the D2 running the D2+ firmware as well as RMAA proof showing that changing the firmware has also changed the sound signature from BBE to BBE+.
Update: Cowon contacted us to warn that there is risk in bricking (damaging/rendering it useless) your D2 by doing this. So in my words, do this at your own risk.