Motorola so had this down pat last year, but we suppose O2 is just showcasing its pedal-powered charging system now that such devices are all the rage. Just days after we had a look at two unorthodox chargers from Orange, along comes rival O2 with a bicycle-related alternative. Reportedly, the eco-friendly device will be demonstrated at the O2 Wireless Festival in London's Hyde Park, but unfortunately, each of the demo bikes will be stationary. Still no word on whether O2 has a mind to take this thing commercial, but for cyclists the world over, here's to hoping it does.

[Thanks, Adam]

It may not be legal in most civilized nations to ride a Segway on the sidewalk, but for those still risking their lives on a two-wheeled machine, things are about to get a lot safer. SoundofMotion has developed a clever new warning system that turns your phone into what sounds like a roaring motorcycle, and not content with just playing a pre-recorded loop over and over, it's actually designed to rev up and down based on the speed and acceleration of your bicycle. The application will run on "any Bluetooth- and Java-capable phone," and it interacts with a "wireless BT sensor" that gets mounted on one of your wheels. Unsurprisingly, the device responds to the motion sensor and lets the carefree motorists around know you mean business when crossing an intersection. The app is currently sitting in beta, but the creators hope to have a final rendition ready to go before you make too many summer treks, but you better be willing to face total embarrassment (and have one loud speakerphone) to save your skin before picking this up. Click on through for a demonstration.

[Via Slashphone]

Here at Engdaget we completely support laws that make the roads a safer place for everyone, but this is a little ridiculous. Legislators in New Jersey are trying to pass a law where it would be illegal to talk on your cellphone and ride your bike. No, not a motorcycle, a bicycle. (Yeah, we know what you're thinking.) The rider would get a ticket for doing such and the fine would range from $100 to $250. We guess it could be worse -- we could live somewhere like Lawrence, Kansas or Honolulu, Hawaii where your cell phone can get you a all all types of trouble with the law.

[Via Textually]

Here's one we weren't exactly counting on seeing. Motorola's cheif executive Ed Zander rolled into a packed room here at CES on a bright yellow bicycle, topped off by having Queen's "Bicycle Race" cranked in the background. Yes, oddly enough, Motorola is coming out with a self-branded bike for "emerging markets," which translates into countries where energy sources are scarce. While the company has seen declines here in America due to a very saturated handset market, nearly 5 million folks per month are going mobile in China, thus the need to penetrate those potentially lucrative third world areas. The vehicle will sport a cellphone charging system to provide a way to energize those handsets so intently desired all around the globe. As expected, a cradle on the handlebars would house the mobile, while the motion of the pedals would generate electricity to recharge its battery pack. While this might not sound convenient or even worthwhile in a place like America, "more than 500 million Chinese people rely on bicycles as their primary mode of transportation," which could also mean that half a billion folks in China will soon be cruising the streets while doubling as an AC adapter.

[Via Textually]