I'm up and running.. pleased to see that sources.list was backuped as well, I wasn't aware of that. Anyway I made several additional tar backups before I upgraded, presumably e.g. the maemo mapper maps have to be re-installed from backup, but so far settings etc. seems ok. I haven't flashed the unit before this.
I agree with Milhouse about the docu.. not much of a release note, compared to what's normal where I work.