Update: NOM does it again. Mario Kart speculation? Head on in for an update...
According to a statement courtesy to CVG, apparently the report in the official Nintendo magazine wasn't really... official at all.
"The details printed in Official Nintendo Magazine 21 regarding Mario Kart Wii were healthy speculation on our part and are in no way an official announcement from Nintendo. We are sorry if we have mislead anyone. We do not set out to mislead our readers. ONM apologises profusely for any misunderstandings that this has caused."
Here we go...again.
Original Report: A snippet in the recent UK Nintendo Official Magazine reconfirms the upcoming Mario Kart for Wii to have online battle features, adding the ability to have 16 players go head-to-head simultaneously. The report also reveals the ability to perform mid-air tricks for those itching to show off their karting skills whilst vying for first place.
Thanks to Jump_Button for the tip.