Call me a genius, I managed to delete all the comments from the blog (yes, all of them) when getting rid of spam comments. Another proof of how spam ruins everything. Or not thinking about what you’re doing.
I’m currently trying to get my hands on a proper backup of the database, but it doesn’t look good (you know how it is with backups). If worst comes to worst, all the comments since mindgarden moved to the new server might be gone forever. So if you left a comment on mindgarden and it isn’t there anymore, it’s not because I don’t like you and deleted it.
In the meantime, far more serious things are going on in the world. So please go ahead and donate some money for Haiti if you haven’t done so yet

It’s laborious but have you tried Google’s cache, http://www.google.com.au/search?q=comment+site%3Amindgarden.de ? I was able to find at least some comments that are no longer on your site.
Pretty good idea. Laborious indeed though. But for at least the most recent ones probably the way to go, thanks!
Update: I’ve managed to rescue quite a few comments from the google cache (as the database backup was indeed non-existant).
Some are still missing, and that sucks greatly, but at least they’re not all gone. Again, if you’re reading this and one of your comments was lost, I deeply appologise.