It's a small world after all: Friend-of-a-Friend

 Syndicate information about yourself using RDF and Friend-of-a-Friend markup. See the FOAP wiki. You can tell *machines* here is where my picture is, here is where I work, here is where my blog is hosted; and much more.

See here for some FOAF ideas, along with a FOAF Firefox extension. There is an idea to use FOAF to represent class schedules etc.

IBM Devworks article

Also, see Redland, an RDF application framework with many different databindings - Java, Perl, Python, C etc etc.