spoke with Nintendo of America and asked what the "i" in DSi stood for. The representative explained it is symbolic of the "subject "I" and its personal aspect," also the "two cameras gives the system its own eye on things."
No matter how ridiculous that answer sounds, considering Nintendo took a word like Wii
-- previously associated with male genitalia and urine
-- and turned it into the best-selling console
of this generation, we're totally not going to question its logic in naming things.