Just stumbled over this. A fun novelty, but might as well stick with a standard GPS IMO. It's just shifting the visual part of the unit a few feet ahead of you. Plus varying road surfaces may make it difficult to read. Would look solid in the dark though What do you think?
http://www.eta.co.uk/2010/02/23/bicy...rm=tam+tam+gpsFor those cyclists in the market for a sat nav, itís much easier and safer for them to be looking at the road ahead than a handlebar-mounted screen