Ant512 has released a new version of his Windows like app for the DS, heres whats new:

No new source yet, but I've put together another demo:

http://ant.simianzombie.com/files/bi.../woopsi021.zip

Lots of bugfixes, but the two main changes this time are screen backgrounds (achieved with the pre-existing SuperBitmap class) and Amiga-style screen dragging. You can now drag a screen's title bar down to reveal the screen below.