Storage is a big problem, the largest CF cards are around 1gb, and that is not going to give you anything more than about 1/2 at 24 bit (give or take) If you go microdrive the largest now is 4gb, and that is only going to give you around 2hrs.
So, cool gadget? yeah!
Feasable? Eh...
Plus, I thought there was reliability problems at 24?