yeah it's amazing how quickly it vanished. i have 10 packs left, so i wasn't worried, but i did a search and nobody has any. there are some UK sites that still carry it, but be prepared to spend 15-20 bucks for a pack now, as opposed to the 8.95 it used to be.still lots of 667, 669, etc. on ebay, and you can get it for the same price or cheaper. i just got 10 packs of fuji 100B for 45 bucks.
i hardly ever see square shooter shots other than my own, so i don't know who's using it all up. a bunch will probably show up soon. like when agfa film went byebye, there was none, but now you can buy packs of 50 rolls on ebay for a decent price.