For their new "Purple Pedals" campaign, Yahoo has dispatched a handful of GPS-enabled bicycles equipped with cameraphones that automatically shoot and upload photos to Flickr to riders in cities all over the world, from San Francisco to New York and soon, to Singapore, Denmark and the U.K.. The bikes come with solar panels which power the camera, and special software that uses the phone's accelerometer to snap photos every 60 seconds automatically when the bike is in motion. I was one of the lucky folks to get my hands on one of these bikes, and I've been riding it all over San Diego for over a week now. Let's take a look at how the bike works, how it was made, and how you can turn your handlebars into a tripod and photo-map your neighbourhood in similar fashion.

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Photography enthusiast blog Photojojo details how to mount your point-and-shoot camera on your bicycle for fun and creative shooting. The supplies are cheap (under $10), and putting it all together is a breeze. When you're done, you could use it to snap photos at intervals for a time-lapse or shoot some video like Photojojo did above. If your camera doesn't support time-lapse (or you just want to really soup it up), check out how to turn your point-and-shoot into a super-camera with CHDK.

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If your two-wheeled transport is in need of a seasonal tuneup or any kind of fix, The Bicycle Tutor can clearly explain what you'll need to get it done. Run by a photography enthusiast and serious bike geek, the site offers plain-English tutorials in both hi-res video and full text. The streaming videos are free to watch on the site, but you can buy QuickTime videos for a buck or two to load on your iPod and bring out to where the work is. It's a good bookmark for everything from changing a flat to replacing your chain rings.

The DIY hackers at Make magazine detail how to deter thieves from targeting your prized cycle by uglifying your bike. The idea: The less desirable your bike looks to a thief, the less likely they are to steal it from among the throngs of other potential victims. Starting with ugly paint and faux rust and ending with a few tacky stickers, the author suggests several tried and true methods for making your bike appear as undesirable as possible. Keep in mind that the article is also quick to point out that this is not theft prevention—a bike lock is still necessary—but considering how easy it is to steal a bike in broad daylight, a lock plus some skilled uglification could make all the difference.

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Cyclists and geography geeks will want their very own Frida V - the Free Ride Data Acquisition Vehicle. This project's website describes the project like so: 

"Frida V. is a rugged and comfortable bicycle equipped for efficient exploration and mapping of public urban spaces. It carries a small computer, GPS positioning device, 802.11 wireless network transciever and a basic audiovisual recording unit. The consolidated software and hardware assembly enables automated mapping of stumbled wireless networks, easy creation of location-tagged media and opportunistic synchronization with a server resource on the internet. In other words, let the warriding and rideblogging begin!"

As the Make blog notes, all of the open source software and hardware design for the bike can be downloaded from the Frida V. Wiki. Nice.