Plugged Midi-In cable into the MIDI Out port of Midi-Keyboad and then USB to the computer (Ubuntu Linux 8.04). Has me automatically 20 as Alsa device: 0 reported. The following command I did it with Timidity connected (on its configuration, I did not address here):
aconnect 20: 0 128: 0
And already plays the keyboard wonderful MIDI sounds on the sound card of the computer. Also no noticeable latency (And even if one was there, it'd rather be at Timidity the settings are as at the USB adapter).