I'm about 30 hours into Xenoblade Chronicles, and one thing I've made a point of doing in every region is filling up the Collectopaedia with all of the various shiny blue dots of fun that are scattered around the world map.
Normally, with each subsequent area I enter, a new page is added to the Collectopaedia, starting with Colony 9, then with Tephra Cave, and on to the Bionis Leg, and so on and so forth. However, since I've started playing, there has been a page marked 'Other', with far fewer 'open slots' than any other page. I am yet to find any items that belong on this page. Where are they? What are my rewards for finding them?