Wondrous items are magical amulets, bracers, gauntlets, belts, robes, boots, cloaks and so on. Essentially, everything that's not a ring, weapon or piece of armour.
The "examine recipe and craft item" needs special recipe items to be implemented by a module builder, I think. But the feat should allow you to make the above equipment like you would anything else - by first crafting a "plain" one by using the "Craft item" feat on yourself, and then using the craft item feat on the plain item.
