T-DOSE is a yearly event held in the
Netherlands to promote use and development of Open Source Software.
The conference is free for all to attend (no registration or admittance
fee required) and will this year be held on 13 and 14 October 2007 at
the Fontys College of Applied Science in Eindhoven.
http://www.t-dose.org/ holds all the useful information.

The conference talks schedule is online at http://www.t-dose.org/node/27
A wiki with some additional details (not official, but better updated)
can be found at http://linuxwiki.de/T-DOSE2007 .

There will be a CAcert stand (see http://www.t-dose.org/t-dose/node/3)
and assurers will be present for certification throughout the
conference.