The evidence appears to be in about "omega-3 eggs". There are quite a few studies showing the benefits of eating them over conventional eggs:

http://paleoclaims.com/claims/omega-3-eggs-are-healthier-tha...

A quote from one of the studies on that page:

"Three n-3 PUFA-enriched eggs provide approximately the same amount of n-3 PUFA as one meal with fish.""