sharing is gaining momentum. sunil paul of brightmail fame is working on a peer-to-peer car sharing system to be initially launched in the bay area, and www.relayrides.com recently announced they’ll be launching in baltimore. it’s validating to see some activity in peer-to-peer rental markets.

neal gorenflo, publisher of shareable.net is one of sharing’s ambassadors. if you’re looking for thought leadership on building a better world through community, be sure to bookmark shareable. here’s a post with thoughts on sharing from robin chase, co-founder of zipcar.