I found this. Nothing new but interesting anyway.
"The opening ceremony is three hours long, two hours of which are devoted to the athletes’ parade; the rest, dubbed “Isles of Wonder,” will be Boyle’s affair. He took inspiration from a line in Caliban’s speech from The Tempest—“Be not afeard; the isle is full of noises”—and this quotation is inscribed on a 27-tonne bell, now the largest bell in Europe, that has been cast for the ceremony and will ring in its 9:00 p.m. start. The Olympic torch is scheduled to arrive via the River Thames, and hundreds of volunteers from Britain’s National Health Service (“One of the most extraordinary things about Britain,” says Boyle) will be featured along with close to 1,000 children from the surrounding boroughs to celebrate the local schools, 12,000 other cast and crew members, music by the electronic duo Underworld, and a flying system that can lift weights of up to 25 tonnes...."