Just thought I'd put an excel sighting up :)
http://muertitos.comicgenesis.com/d/20050915.html
Not a very favorable pseudo-cameo right there.
I remember that artist, though! I used to read a webcomic of his... not Muertitos, which I never liked all that much, but the one about a magical girl... what the hell was it called... something Reiko.
ETA: Flying-Suit Reiko! That was the one.
I saw one with puchus in it but I can't find it.