Hi All,
I just got off the phone with my favorite Polaroid customer service rep, at their headquarters in Massachusetts. I asked about the type 55 film.
She said it is NOT discontinued. I repeat: NOT! (We can all exhale now).
I asked about the availability numbers on the site, and she said she didn't know why they were there, but that they made no sense. That all those film are still in production (except for type 51). Type 59 (color) has been 'stickered', to warn that it will go out of production in about a year (though it will still be available for a while after that). But Fuji does make a 4x5 color film, so even though the loss of any Polaroid films is sad, it won't be as damaging to those who need it.
She also said that there's no garauntee that things won't change in the future, but as of now, there are NO plans to discontinue 55.
Considering that, with all the films they have discontinued, there has been a warning period of at least a year or two, we are safe for a while.