From RDFaWiki

This is a page for templates that can simply be cut-and-pasted into your pages.

FOAF

First Steps in RDFa: Creating a FOAF Profile, by Mark Birbeck on XForms and Internet Applications.

Calendar/Events

How to do hCalendar in RDFa by Steven Pemberton

SIOC

RDFAiser votre blog, la théorie et la pratique, in french by Gautier Poupeau on Les petites cases.