Jeff Gerstmann and Ryan Davis ventured into San Frantastic for Nintendo's spring media summit the other day, where they showed off a number of upcoming first- and third-party games for the Wii and DS. They can't talk about most of the stuff they've seen so far, though they say you can expect a deluge of hands-on stories and a bombcast chock-fulla Nintendo talk this coming Tuesday. One of the things they can discuss right now is Mario Super Sluggers for the Wii, which they got to see in action for the first time today.
The gameplay definitely appears to take a lot of its cues from the baseball minigame in Wii Sports, using the same sort of motions for batting and pitching. It will expand on those concepts as well, letting you perform special pitches by holding both the A and B buttons while you throw, though it's safe to assume there will be plenty of other ridiculous twists on the action as well. There will also be a little fielding in the game, though it seems to involve little more than waggling the remote.