Per indications from Devrim, I have given up on getting my blog entries back from the old planet machine. If they do show up, that would be a happy surprise, but I now consider it a very remote chance that it will.
Instead, I have now recovered some of my blog posts using things like google cache, the wayback machine and such methods. I will be cleaning up the old posts and turning them visible one by one over the next couple of days... If you happen to have some of my older posts saved away somewhere, please let me know :) And if you spot formatting errors in something you find, then let me know that as well.
Finally, if you're coming to this post from a redirect. Sorry, all the old URLs are "gone", and I don't know how to get a redirect for them. Please use the archive to browse to the post you were looking for.
Update: A bit quicker than I thought, my script did a fairly good job. I've turned everything I managed to recover visible by now...