Nifty Additions

(1) Add an IFP (like mbox_sha1sum) to the drupal output of buddylists. Even if it's in the form of sha1(user@site.com) for drupal xsite logins. Otherwise, apart from foafnet, the foaf is next to useless for mapping out relationships. It's part of foafnet basic and key to foaf, as you can see here.
(2) rdfs:seeAlso for buddies. If you don't want to bother with an mbox_sha1sum for buddies, an rdfs:seeAlso to *their* foaf descriptions would identify them perfectly well.