Well... after just over four years I have a brand new version with a resolution independent interface and a more muted graphic style.

There are a lot of bug fixes and new features over the last released version. Including more paint modes, being able to draw sections of a circle / ellipse. A lot more brush tools, tile mapping, and customisable right mouse button and held left and right mouse button drawing modes.
I've done a very quick and super simple website and there is a Dev thread on the TigSource Forums for people who are interested. I am also on Twitter and posting about D-Pixel under #DPixel.
Check it out if you are interested (it's completely free and unrestricted):
http://www.retroidea.comExample of the new interface:
