I think the BIP should only be a DIY pamphlet.
It was birthed in a crush of creativity, hastily compiled, with half-assed layout. Taken as a whole, it has a frantic, unfocused quality; while at the same time, each individual piece is coherent and well-written.
It would be to, i dunno, formal to bind it and hawk it on Lulu. It's meant to be left in bars, on trains, and in legislator's offices. It's supposed to be underground, contraband, samizdat.
There may well be a place in the presses for a "proper" BIP book, but the original pamphlet is not that book. But I see nothing holding anyone back from writing, compiling, and editing something about the BIP for publishing.