File Transfer: How to transfer files betwen my Xperia Neo (Android 2.3) and Kubuntu Linux?
In my case (KDE4 on a Debian Squeeze) it worked easily after setting the device as MSC. It was directly automounted by KDE.

To do this just go to: Settings -> Xperia -> Connectivity -> USB connection mode

As I have Spanish language in my Android I suppose the translation will be something like that.

It also worked in the same computer on a WindowsXP inside VirtualBox.