For those that care to download it, the Japanese Final Fantasy Type-0 demo is now up on PSN. You can either grab if off the Japanese PlayStation Store (you need a Japanese PSN account for this) or grab it at this link.
If you use the link, scroll down, hit the red button on the bottom-right, then scroll down further on the next page, and click the big red button in the centre of the page. You’ll need firmware 6.39 or above to run the demo and 332 MB of free space on your PSP.
You may find the following resources useful while playing through the demo, so give them a read to get a better idea of what’s what:
Watch Director Hajime Tabata Play Final Fantasy Type-0 (the same demo)