Hi all, We've just released an experimental app for improving N900 camera, it does HDR among other things. The alignment function is now rather simple, so you'll want to put the phone on something steady to get a good HDR with no misalignment artefacts. In future we'll make it possible to shot HDR from hands (we already have a good alignment algorithm in our PC app, the challenge now is to force it to a mobile ). The app is free, check http://BlessN900.com Your feedback is welcome.