I just read the Gentoo Weekly Newsletter: May 23th, 2005 and found grml mentioned in section 'Austria: Grazer Linuxtage was a success'. :-)
Tobias told me that grml is mentioned in the german it magazine c't in current edition 12/2005 on page 60 with softlink 0512060.
BTW: I'm collecting all the press links on grml.org/press/. If you find another ressource where grml is mentioned please let me know.