I'm a big fan of bells .. every rail trail deserves one. Here's a design that caught my eye a few years ago from Denmark.

http://sogrenibikes.com/index.php?ma...&products_id=2

While I was attracted to the simplicity of the design, I'm not confident of what the sound would be like. Plus, for the cost, it kind of looks like it was put together with leftovers from my plumbing box. Rootboy could do better!

Here's another Kickstarter project I've been following, a magnetic bike light. Seems ideal if you have multiple bikes and are looking for a way to interchange them easily:

http://www.kickstarter.com/projects/...e-lanes-worldw

Scott