I had a teacher in our office today looking at the eBeam system, he already has projectors and was looking for a portable easy to use IWB system and it seems the eBeam fits the bill perfectly.
We were playing with Geogebra, something he uses all the time in his class with his tablet computer - he then asked if I had seen nrich.maths.org -
nRich s a UK site with resources for both interactive whiteboards as well as printables that go along with them. its a bit hard to get to all the interactives so here is a quick link to the 350+ maths interactives.
I'm going to be busy looking for all the good ones to show people.