Many Drupal modules integrate with the Token module and it is used in almost every Drupal install for defining path aliases and even custom breadcrumbs.  Its so popular that in the upcoming Drupal 7 release token is integrated into core.  

If you're developing your own custom module why not integrate with token and allow your users more flexibility with what they can do with your content? With two simple functions you can easily integrate your module with Token.

I was able to integraete Facebook Connect into kBasarab.com today.  Facebook Connect allows any user of Facebook to login to kBasarab.com without creating a new account.  Simply click the Facebok logo in the upper right of the site to login.  Then when you comment on any blog postings or photos here at kBasarab.com those will be published to your Facebook page as well.  Feel free to give it a try in the comments below.