The pro version is just a rumor, its not coming out. The regular version is out but alot of web stores has it on preorder due to high demand.
Mine came in the mail today. Good flash cart, I like the interface. Good compatibility for DS and GBA backups too. I ordered 5 of them from Winsunx as a joined order with a couple friends to save on their ridiculous shipping rates.
they're supposed to come with the dark blue, light blue and white cases. i might try to put mine in the official cover that came with the ds. IF i ever get to buy one, that is.