The idea certainly sounds nice.
I guess there are tons of things one could do during a dutch workshop and tons of people one could invite.
I wouldn't mind talking to some people with CNC-stuff like reprap. Playing in a band I also wouldn't mind working with/designing of DMX light effects.
I could probably name 6-10 other things that would interest me, but to be honest, I'd hardly know what the average (if existing :)) arduino- "cheese-head" would like to see/do.
Do you have some ideas on what you would like to do ?
I hope it will get very busy around/ in the Hague for ages to come. Living in Middelburg and electronics being one of many hobbies it will probably be hard to visit often though.
Bart.