Although we haven't yet ordered our interactive white boards, we have had the good fortune of aquiring a class set of individual "old fashioned" white boards and markers, and the students LOVE them!
Originally, I had intended to use these in an attempt to save paper. (It is the process of solving the problem, for example, in math, that is important to me, and not necessarily always the product, sometimes consisting of reams and reams of paper! The whiteboards allow students to draw or write their thinking, but without having to consume all kinds of paper in the process. Once solutions or ideas are shared, you simply wipe off the board, and it can be reused for something else.)
As I discovered the first time I pulled them out to use, and in subsequent lessons, there is an additional bonus to using non-paper: student motivation goes way up with the integration of a little novelty like this!
Now... let's see if it lasts, hehe.