What is T-DOSE?
The T-DOSE Foundation (Technical Dutch Open Source Event) strives to promote the use and knowledge about Open Source software. By organizing a yearly event called T-DOSE the foundation hopes to give Open Source communities a platform on which they can interact amongst each other and present themselves to their user base. In the Netherlands a foundation is known as "Stichting".
Sessions: I'll be sitting in our dear friend Matt Rechenburg (and will also meet Kris Buytaert).
What I will attend:
Effective enterprise application monitoring with Nagios/Cacti
And Matt's session:
Automated Rapid deployment in modern data centers
Whole list is here