As we type these words, momentous events are unfolding in central London. Mayor Boris Johnson is officially unveiling a new transport initiative right in the very heart of the capital. The most eagerly anticipated improvement to the city's pedestrian infrastructure since, well, um, um. Still, we can't help but feel a little excited about the cruciform crossing that opens today on Oxford Circus. The junction has long been among London's most hideous pedestrian experiences, so the changes can surely only be an improvement. Can't they? We'll be along later to put the crossing through its paces. But if you've been one of the first to take shank's pony across this increasingly linear Circus, please share your experience in the comments below.