Hi there from The Girlz Korner in upstate New York where you'll find light, witty and rather entertaining articles on every topic imaginable from The Little Black Dress to Making Whoopie. So if you get a chance to kick back and exhale, if only for a brief moment ... come on over and see me some time.
In answer to your question, a pingback is one of three types of linkbacks, methods for Web authors to request notification when somebody links to one of their documents. This enables authors to keep track of who is linking to, or referring to their articles.
Just letting you know that someone linked to a post of yours :) Let me know if you need anything else :)