AFAIK there isn't any autorun feature on *nix.. At least nothing "standard".. There may be some distros that have their own version but I doubt it would work on all of them. I know for a fact FreeBSD doesn't have it..

I think you may have more luck looking at GNOME and/or KDE for anything remotely like autorun.inf.. Think about it.. If I'm in a console... What would start? But as far as I'm concerned, I'd consider auto-running anything from a cd a security risk..

Why not make a README or something similar in the root and dump everything else in subdirectories? Add the autorun.inf for the average Joe Windows user... I'm sure Linux/BSD users are able to figure out they need to start with the README

Heck, if you want something really wild, why not build your own live-cd?