My home page has the FOAF link as described by Egon plus an ICBM meta element for use by GeoURL and XFN data on the links to friends and sites I am on.
It has long been my aim to generate this page based on data in my FOAF file so that I only have to maintain that. I'm interested in any scripts that would do that for me. If they can also include RDFa data then that would be great. The ideal would be something that could use a template file to define the general page layout. Something in Python would suit me best as I've at least used it. This probably ought to be a new question.