I agree, that's clearly what the original poster was talking about. I was talking about the following post.
While I think it's unfortunate they didn't drop the price to reflect a much cheaper system, I think one will be coming. I suspect they did this revision (Simpler disc drive, elimination of GCN memory card and controller ports, elimination of the vertical stand, etc.) to trim cost to clear the runway for a $99.99 Wii sometime this year. I imagine they felt like the Wii with Skyward Sword had one more good Christmas left in it at $150. And I suspect most Wii buyers of the last few months had no interest in GCN compatibility and probably were unaware it wasn't present on their console (After all, it looks very similar to the original model).
My impression of inyouratmosphere's post was that he owns a Wii, wants Mario Kart Wii, and mistakingly interpreted Phill's post to mean that it was out of production. Mario Kart Wii will be widely available new for years to come I suspect. Wouldn't be surprised to find that despite it being bundled with many Wii's last year that it's still the top selling game on the platform despite the $50 MSRP.