Sam Madison was just put on injured reserve and is going to miss the playoffs. This isn't a big deal for the Giants as his role has been diminishing, but it does hurt their depth. Crafty corners like Madison can always come in handy.
More importantly, the Giants have the bye week to get Brandon Jacobs, Justin Tuck, and Aaron Ross healthy.
Tuck played some against the Vikings and should be close to 100% by next week. Jacobs and Ross should be fine and I think Jacobs could've played if the game meant something to the Giants.