Cut pages into small pieces

Hi,

It'll be nice to be able to cut pages into pieces.
For example, when you have a PDF formatted as a booklet (2 or 4 pages per side).
Or if you're presented with an horizontal presentation put on legal format, 2 slides per page.

Cutting would be very useful if you could tell separately for horizontal and verttical cutting, identical or different sizes of pieces, and how many cuts per page.