The full quote about the feature from today's press release is as follows:

Later in the day on Monday, Nintendo will make your holiday shopping just a little bit easier. If some people on your gift list have visions of classic video games dancing in their heads, you're in luck. Starting this week, Wii Shop Channel patrons can use a new Gifting feature to send games to other Wii owners with whom they've traded Friend Codes. It's an easy and inexpensive way to give your fellow Nintendo buffs the gift of a classic game - no wrapping paper required. And don't worry about duplication. If your friend already has the game you're trying to give, you'll get a simple message and be bumped back into the catalog to continue shopping.

P.S.: I'd really like Light Crusader or Wave Race 64!