I don't know if anyone will be able to view this page. You may have to sign up with New Scientist..
First couple sentences:
NOT feeling your front crawl? Breaststroke a little off-kilter? Not to worry, a robotic swimming buddy can help you out.
Swimoid is a robot that glides along the pool floor underneath you as you swim, monitoring your form and providing real-time feedback on a 50-centimetre LCD screen.
The triathletes would be quite jealous of you showed up to practice with one of these... :-)