Hi, Gentoo. In an mdev system, getting USB device nodes working well enough to support USB printers is tricky.
I have just added a section to the mdev wiki page (http://wiki.gentoo.org/wiki/Mdev) explaining how to do this. Apologies for any misuse of wiki markup (at which I'm a beginner). Suggestions for improvement are welcome. -- Alan Mackenzie (Nuremberg, Germany).