Let’s Encrypt is a free, automated, open-source certificate authority (CA). The goal is to revolutionize encryption on websites, making HTTPS implementation a seamless, no-cost option for anyone with a domain.

Sounds interesting, what are your thoughts?

Anything that helps get the encryption message across is 'a.good.thing' and anything that helps reduce costs to encourage adoption/implementation ditto. I've been a fan of the Let's Encrypt project since the get go. I rather like the short-term option (validity of just a month) which can limit threat surface exposure when the almost inevitable first theft of the things occurs.