Autumn Jazz: Kodachrome was previously manufactured for 120 format through sometime in the 1990s. I have three rolls in the freezer, still sealed. They likely will never get shot, as no lab will dip-and-dunk a batch for processing. I believe PE has noted in the past that it's technically doable if a lab is really dedicated to it, but the sheer upstart obstacles make such a line impractical to impossible.
CRhymer: It's quite intriguing to hear that you can still walk into your local store and find current KR64 36exp just there as if it's another day. I always keep my eyes open here in the GTA, but I never see any flukes like that (such as at independent pharmacies, corner grocery stores, and the occasional independent camera shop remaining). It would be fun just for the sake of it. In lieu of Kodachrome, I am still quite loyal to E-6 emulsions, as it's the only colour I shoot with my Pentax 645. I have a few Fuji NPC160 220 rolls in the freezer, but I've never shot them. I guess I was thinking I might be called upon one day by friends to do a wedding of theirs.
But as C-41 goes, I've tended to avoid it entirely for a number of reasons, aesthetics being one of them. If it ends up that E-6 and K-14 are both no longer processed due to chemicals no longer being produced, I might end up just staying exclusively b/w as long as the Ilfords and the Efkes and the Rolleis are still being made. And I guess Acros, too.
Kevin: Several medium format film cameras are still being made, including the Pentax 645NII. Others, like Hasselblad, do offer non-analogue film backs (or at least support them by third parties), but there is still a market for their film bodies. And I seem to recall that Mamiya is still committed to 645. I've not considered 6x7 and 6x9 systems, but perhaps someone else can verify whether these too are still being sold. And I suppose one could toss in Holga, too, if one likes shooting with a plastic lens.
With regard to Wal-Mart in Canada, it would assume that Wal-Mart Canada have an arrangement with Fuji Canada, which is a separate corporate branch of Fujifilm. I'm not sure (or else it isn't clear) there is one. While Shoppers and London Drugs do (which I haven't looked into Rexall or its other brand holding, PharmaPlus), I don't know about the Costcos we have here. If I had "throwaway" rolls of Kodachrome to experiment with sending off (without worry that they'd be lost or, more moronically, processed in the wrong chemicals), I'd chance it. But I don't, and based on what I've found, I'll go with certainty over doubt. Time's too limited to be "trying" out questionable routes of processing cheaply (e.g., the gamble of just tossing a roll at Wal-Mart Canada and hoping for the best, not unlike sending a message in a bottle).
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Last thought: now that I can shoot Kodachrome and know how and where to get it processed, I am. I wish I'd known about this a decade ago when I first picked up a film camera. I love its colours, and while I use E-6 for certain applications (and entirely for MF), there's a little reminder in me that when I load a KR64 rolls into my Nikon, the emphasis in one isolating subjects with distinctive colours -- particularly synthetic ones -- and light colour temperature variations within a single frame. I'm thinking that shooting a night neon sign series could be fun. Like Kodachrome, vintage (and creative) neon signs seem to be endangered and nearing extinction.
-Astrid