I follow @ATerribleIdea on Twitter. He has been posting images of his new DM Screen up there and I have to say that it is one of the coolest ones that I have ever seen. Check some of these images out!
It works like a portable box, that folds out and can hold all kinds of goodies, like your role playing books, you dice, your minis, 3x5 cards. etc.
The entire outside of the box can be marked using wet-erase markers. What a brilliant idea! On the top, in the above picture you can see that he marks the top with Character names based on people's seats around the table.
The inside of the box, on the right and the left, uses wet erase, portable bat maps as covers for the shelves and compartments.
In this shot, you can see a close-up of one of the wings, with the Battlemat/Lid partially removed. The inside has space for dice/minis/counters/3x5 cards.
When he closes the whole thing up, it has a handle and uses straps to hold everything in. The whole case looks awesome and I am hoping I can convince him to teach me how to do one myself. This would be a completely awesome project to undertake.