Missed this one last week: Judy's Book, which seems to have overhauled its business model from local business resource to all-purpose shopping site, launched a service that lets customers search online coupons.

The new service, CouponLooker, keeps track of the current promotional codes that will give discounts on Web sites.

Analyst Greg Sterling writes on his blog today that no site really owns the online coupon business, leaving a wide open opportunity for Judy's Book.

"There's no 'top of mind' coupon site for most consumers," Sterling writes. "And most coupon sites, because of uneven coverage, are 'push' models instead of 'pull' [the search model]."