1. Can you gift DSi ware like wii ware
2. Is it allowed to use a dsi in a plane since it connects to wifi more, if you get what i mean

1. no
2. i believe so

1: not yet
2: considering you can disable wireless communications entirely via the System Menu, i would assume it would fall under the same rules as other non-wi-fi devices, which would mean the answer is 'yes, but not during takeoff/landing or any other time the captain may tell you otherwise'