We use for the next LibreOffice conference a new Plone add-on. It is running on http://conference.libreoffice.org. I’m currently working on a registration form for the conference. I’ve done a bit of the work during my vacation but there are some features missing especially the protection of the form with a captcha.
But there are some other missing features. Today I found out how to validate an email-address and added this feature to my development environment on our TDF-Server. It worked fine for me.