As far as i no there is none.
Ive looked around and heard that DSorganize was made for ds(not dsi) and last time i looked there was no-one
working on fixing it.
Maby in the future there will be a DSiORGANIZE when they find the dsi common key???(i hope)
BUT if you turn off your wifi in the system menu the touch screen works again and you can use the file browser, music player ect.
But not homebrew downloader or anything which needs wifi