Last week I gave a VAC (Vulnerability, Attack, Countermeasure) talk at an OWASP Netherlands meeting. I picked Cross-Site Request Forgery (CSRF) as a topic as it is an often misunderstood and underestimated problem.
My slides (in English) are available on the OWASP site here. I am planning on releasing another version of the slides in the OWASP template and with speaker notes for easier reuse. The last slide lists some good resources and interesting case studies (including more information on the case studies used in the presentation).