I should have made that wording clearer... by "like a firewire plug that is bidirectional (ie. not tapered)" I mean a symmetrically shaped firewire "style" plug

I should have made that wording clearer... by "like a firewire plug that is bidirectional (ie. not tapered)" I mean a symmetrically shaped firewire "style" plug, only with the same pins arrayed down each side... so no matter how you plug it in it's correct.