I'm not one to preach, but I was interested in this thread, because recently in Australia, this was a big news story which I've cut and pasted from our local newspaper (Sydney Morning Herald):

iPod blamed for Aussie death
February 14, 2006

An Australian woman was knocked off her bike and killed, possibly because she couldn't hear traffic noise because of her iPod music device, friends say.

Patricia McMillan was knocked from her bike in a London street and thrown under the wheels of a lorry near her home in Acton, west London, on February 2, reported Britain's Evening Standard newspaper.

The 32-year-old law student had been on her way to a part-time job as a waitress in Kensington when the crash happened, the newspaper reported.

Ms McMillan's best friend, Jacques Poullard, said she may still have been alive if she hadn't been listening to the Apple iPod.

"She was obsessed by that thing. It wasn't that she was careless. I bought her the bike three years ago and it was how she travelled everywhere.

"I never said anything to her about wearing the iPod but now I think if she hadn't had it on she might have heard the lorry.

"I hope people will think twice about cycling while wearing headphones."