I compiled a quick and dirty script which uses this C utility and takes a -2, 0, +2 sequence with the current settings in focus and exposure. to run it 1) Place the files contained in the attached file in a non vfat folder eg., ~. 2) Compose and take a picture in with the default camera application. 3) Close camera application without moving the camera too much. 4) Run photo_bracketing.sh from the command line. Wait. the three files will be called rawHDRtest0.png rawHDRtest1.png and rawHDRtest2.png
Ok, so this is my first HDR pic made with the N900. Made from 11 pics EV -5.0 to EV 5.0 . On the desktop I ran enfuse to merge them to this Nothing impressive but I think there is potential for a cool app if someone want to pick it up.