iPhone 4 parts just keep on dribbling outof China and turning uparound the world -- this time it's the next-gen phone's outer case on a video from iPhone Portgual. The site actually has two cases, which it says were purchased by a reader in China, and while they look genuine enough, we obviously can't tell for certain whether they're real. In any event, at this rate we'll have enough leaked parts to assemble the entire damn thing by the time Steve takes the stage at WWDC to announce it in a few days -- or hey, maybe he'll just show it off at D8 tonight. Either way, we'll be there. Videos after the break.