If anything, DSi mode will allow the device to connect to most if not all wifi access points that use the current WPA encryption. DSL mode is limited to WEP encryption, which is easily broken and thus rarely used. It would be cool to be able to connect to a network with homebrew like a ftp backup app. Is DSi mode unique to the dead CycloDS? Or is flashcart DSi mode completely blocked by the latest DSi/3DS firmwares and so there is no point?