I presume you mean the two cameras they have:
EXILIM Pro EX-F1
EXILIM EX-FH20
Both are out now. The first is faster, the second (newer) has more megapixels.
http://video.nytimes.com/video/2008...h/1194817119384/casios-high-speed-camera.html
http://popsci.typepad.com/popsci/2007/10/hands-on-with-c.html
http://www.photographyblog.com/reviews_casio_exilim_pro_ex_fh20.php
I suspect they are the vangard of what is to follow. At the moment, neither camera holds much interest for me, mostly because of the high price for a small sensor - but I will follow this new experiment in digital photography with some interest - if it attracts a following, it may be copied by other manufacturers, and may become something more along the lines of what I'd think was useful for me.
It may well be useful for some applications. I can imagine sports coaches and instructors loving it for disassembling swings, throws, etc - without breaking the bank of high-end equipment and with better resolution than digicam movies.