The iTunes mounts it automatically! That's right. I go to play a song in the library and I get prompted to authenticate. I imagine if I stored this in my keychain I wouldn't even get that. Neat little trick. May have been in iTunes3 and older, but I never tried. Just thought I'd share my experience.
[robg adds: I believe this is a feature of the file manager more than iTunes itself, but I may be wrong...]

