Echelon has an exclamation after it because The Reg are jokingly trying to suggest that the international, government monitoring network and the release group are one and the same thing.
Kalisto, Echelon and ProjectX are console release groups. Echelon started out releasing games for the DC. Kalisto took over the reins in that dept. after Echelon came to an agreement with Sega to stop releasing their games. ProjectX came onto the scene more recently. Echelon later decided to focus their attention on more modern console platforms, as did Kalisto.