Cork bicycle grips have have that nice vintage look, especially when shellac'd. They are comfortable to hold. They are cheap and not particularly heavy. What's not to like? The answer is glue. You must glue cork grips to the handlebars and with really tough glue like Gorilla Glue. There is no turning back once the grips are glued, and it's a messy chore.
It follows that I'm quite excited that Ergon, a fine grip maker, is coming out with the Ergon BioKork in 2010. As with other Ergon grips, they fasten to the bars with a simple clamp. They will also have that familiar shape that is so comfortable. If that's not enough, they are made of earth friendly materials and are notexpensive. Pinch me. My Rivy will definitely get a set of these.