Don't despair. Given the encouraging comments I've received, I've decided to spend the time to translate this blog in English. I won't go as far as translating old entries, though, I can't imagine that it is worth it. You can toggle your language setting here :
Be warned though, there are limitations due to the blogger interface which could be overcome with lots more fiddling, but I don't think I'll spend the time to get everything to be fully bilingual, e.g. labels, titles etc...
If there is something you'd like to understand but cannot, just ask, comments or e-mail will do, I'll certainly take the time to help out... (except no, I don't d'load or distribute diagrams or books...)