I finally found some time to get my blog up and running again. Even found a nice theme to use. Needs some tweeking but it is good enough for the moment.
I have no idea why my blog died on me (bored from inactivity maybe) but instead of debugging it I choose to just move on to BlogEnginge.Net 1.5. Exporting settings and posts was more or less a matter of copy/paste 🙂