Pengiuns sure do seem to be getting a lot of play in recent years. Festo has now targeted them for their latest aquatic and lighter than air robotics. They seem to be doing two versions of these, just like they did with their Robotic Jelly Fish. in their latest promotional video, they show off aquatic penguin robots which use sonar to navigate and communicate, some Mylar, lighter than air penguins reminiscent of that awesome Fin-Fish by LaChLuVe last year, and several other projects involving biomimicry and affordable rapid prototyping.
Update: And more footage of the robotic sea penguins: