IGN's got the goods, folks: this seven-page interview reveals more about Madden Wii than every past publication on the game combined. The interview covers the exact passing controls, special moves with the Wiimote, defensive manuevers, graphical capabilities, the kicking game...it's quite a read.
Of note is that the Wii version won't be "dumbed down" as the initial 360 version was; it contains every single mode and feature that long-time fans of the franchise have come to expect. It also contains some new features, such as the "two-on-two" minigame, which re-enacts the classic quarterback/receiver vs. rusher/safety playground game complete with "Mississippi" counting. It truly is a goldmine of information on the game, and the interviewee is extremely candid on most everything...except, strangely enough, online play. He absolutely refused to speak a word about it. Hmmmm.
[Update 1: Fixed a small typo.]