More and more software is coming out that seems to be targeted at students. The latest is a piece of software called Cram that lets you create tests/study guides and take them on your BlackBerry.
Its a very simple piece of software. You can either build tests on your BlackBerry or create simple text files and upload them through the desktop interface. Not that complicated but there is definitely some overhead involved. I am not sure how this differentiates from the free gFlash+ but it looks interesting. I just hope it is worth the hefty $19 price tag.