Xael said:I figure if you can craft anything different that exactly what's in the DMG, then every wondrous item crafted that differs from them will be approved case-by-case basis.
I think that's reasonable. If the item is a standard one in a different form, and the new form is reasonable for its function (a Robe of Resistance is more plausible than Boots of Intellect), I would think approval would be pretty quick; if it's more innovative, I'd likely want to think a little more about it.