I just found out about this today (thanks, Richard!):
On September 7th there's an email marketing conference in The Netherlands:
De Nationale E-mail Marketing Conferentie
7 september 2006, Media Plaza, Utrecht (The Netherlands)
Speakers include Jeanniey Mullen (Ogilvy) and Richard Gibson (RSA Direct/The DMA).
More info here (Dutch only).
I will definitely try to attend this event, let me know if you're planning to go as well!