I've been in contact with the author of Mangle the past couple days awaiting my DX, and compiled a one-off Kindle 2 DX version taking advantage of the 824x1200 resolution which can be downloaded here:
http://foosoft.net/mangle/downloads/...owsPreview.zip
The main page is here:
http://foosoft.net/mangle/
It is AWESOME. You can see some examples here, click for super high resolution.
More examples here:
http://www.christopherwu.net/gallery/kindle/
w00t!!!
For the curious here are the options I used: