Update: Nikon USA corrected their website, the smoke remains.
Just a clarification on the Nikon TC-17E III teleconverter: this rumor is not based on the Nikon website listing that could be a typo (two typos in two sentences?):
I received the information about the new Nikon TC-17E III teleconverter few days ago and after I posted it online today, a reader pointed me to Nikon's website. Coincidence? I like coincidences:)