Running 7.10 here and all I do is plug in the n800 to a usb cable and I get at least one of the cards (external) open same as happens when I plug in a USB memory stick. Seems that if you run a swap file that it keeps anything from mounting the internal.
If you shared it via Samba/SMB and both your NIT and your Ubuntu machine are connected to the same network than it should be visible in file manager under shared folders, below external memory card. That only works for shares with no password though.
