From Yahoo:

These APIs help you better understand your traffic and usage -- querying for the pages in the Yahoo! index and the sites linking into a site. They will be useful to anyone looking for a good grasp of who is linking to you and to create an effective alternative to easily-spammed trackbacks.

* Inlink Data - Shows the pages from other sites linking in to a page.
* Page Data - Shows a list of all pages belonging to a domain in the Yahoo! index.
* Ping - Allows you to notify Yahoo! of changes to your site. No appid required
* Update Notification - Allows you to notify Yahoo! of changes to your site.



Now you can do all that with an easy CFC