ABC's "Extreme Makeover: Home Edition" showed networks that it was possible to do well by doing good, and now NBC's getting into the philanthropy biz with "Three Wishes," in which singer Amy Grant will travel from town to town, granting wishes.

Grant and her upbeat persona should be enough, but just in case the ABC show's really working because of hottie host Ty Pennington -- a former "Trading Spaces" carpenter -- "Three Wishes" has signed up its own "Trading Spaces" carpenter, Carter Oosterhouse, as well as "Trading Spaces: Boys vs. Girls" host Diane Mizota, as contributors.

We're told that home improvement will play only a small part in "Three Wishes," so what's up with all the "Trading Spaces" vets?

Executive producer Andrew Glassman -- the former WCAU (Channel 10) reporter and "Average Joe" producer -- would like us to think it's all a coincidence (though he says he loves the ABC show).

He claims it's now impossible to get a carpenter to come to your house in Los Angeles because "anyone who has a hammer and nails probably already has their own show."

Afterward, I ask Glassman -- who warns me that if I write anything mean about him his grandmother in Philadelphia will be upset -- whether "Three Wishes" was atonement for "Average Joe."

"I loved 'Average Joe,'" he said, noting that the guys who participated in that "reality" show had a great time doing it.

"That being said, I think I've exceeded my quota of hot-tub scenes for one career."

His grandmother will no doubt be very happy to hear it.