I'm Christian, a native German and a member of WordPress.de. That's where I spend most of my time. If you need to contact me, you can use the contact form on WordPress.de* or simply leave a message on my discussion page (prefered).
* Please be aware that the contact form e-mail account doesn't get checked too often, so replies may take quite a while... :)
Thus, even if you mail me, make sure to leave a note on my discussion page, please... :)