I wrote an ebuild for bb which I'll attach here. It is an ascii art demo which utilizes aalib. I don't have access to other platforms than x86 to test that ebuild, sorry about that, but there shouldn't be too many problems using this ebuild on other platforms as well. Feel free to make it better if you want, it's my first ebuild. I can correct it too if someone points out the problems if there are many of them.
Created attachment 9976 [details] ebuild as described
Created attachment 9977 [details] ebuild as described
whoops, accidently double attached. :) Status: 400 Bad request (malformed multipart POST) is confusing
bb is still not in portage, looks like someone forgot it?
I have further investigated this package and it seems to have little usefulness as anything more than a novelty. I see no reason to add it to portage, but feel free to maintain it in your local portage overlay or submit to breakmygentoo.net