Those of you who know what DOSBox is will be happy to learn that it has not only been ported to the PlayBook but it is now available in App World! Kudos to RIM for approving DOSBox on the PlayBook and allowing for DOS emulation on the device. If I am not mistaken DOSBox was already previously available for sideloading but now it is officially in App World thanks to A7omic Apps.
If you want some emulated DOS goodies with 286/386 CPU emulation definitely check it out in App World. Let us know what you get working!