The Berlin BCI (BBCI) is an independent, EEG-based BCI that was only recently developed (more). It works with 128 EEG-electrodes (picture). Unlike other EEG-based BCIs, the aim of the BBCI is to capture EEG indices immediately before an upcoming movement. To do so it records differences in the so called readiness potentials, variations of betawave-patterns and differences between the right and left brain hemisphere, depending on which hand is used for movement (see coloured recordings of potentials).
The big advantage of this approach is that there is no need of a lenghthy training for the user, as normal, movement-related brain activity is analysed (more). The approach might have limitations, though, when it comes to developing neuroprostheses for handicapped (more).
But for the start, the prime interest of the BBCI group lies in the development of multimedia applications like the PACMAN-game shown in the picture. Only 20 minutes of machine training are required to play PACMAN by thought with the BBCI.