I can't find it, unfortunately.
Edit:
“It’s a tennis game (obviously). It will lead on the Wii. We intend to take full advantage of the MotionPlus controller. It will be the first game for some time to have all of the Grand Slam. (…)” “Several generations of players, from Martina Navratilova to Pete Sampras, to the modern day of Federer”.
“Tennis and maybe golf are the two sports that maybe can take full advantage of the more-sensitive MotionPlus”.
“We will probably have it [WM+] in all of our games. If it is what they say, I don’t know why you wouldn’t. I think you have to provide support for it. If you polish what you have in there, it should give you a better game experience. But, one more time, we haven’t played it, we don’t know what it feels like.” “It has to be optional in some games because your installed base is not 100%”.
(about using the Board in a more physical way) “There’s a great opportunity for EA Sports to play a big role in what I think it’s the next wave, which is ‘health and wellness”. “You can imagine we’re working with the Wii Fit Board” “I agree (the board itself) it’s more about balance and coordination, but I think it’s an opportunity to use it as well for bigger movements, stuff as really good as make you sweat. When you combine Sports to that… it’s a huge opportunity, but… stay tuned”
http://gonintendo.com/?p=53362
Not exactly confirmation, but as close as you're going to get.
