I think you'd be better off designing a scheme for generating secure, easy-to-remember passwords in the first place rather than using hipku. I had to make a lot of compromises to make the entire IPv6 space fit into a haiku. For example, hipku uses many one-syllable words which are relatively obscure, and it uses some words that are very similar to other words it uses.

Without the constraint of fitting an IPv6 address into a haiku, you wouldn't have to accept these compromises. I think it would be better to generate passwords that were a little longer (while still covering a 128 bit space) but much less ambiguous and easier to remember.

It would be pretty easy to do.