Peter Eckersley gave an impressive presentation about the Let’s Encrypt initiative at CCCamp15.
Let’s Encrypt is mainly known for it’s plan to offer free SSL certificates, which is cool, but the most interesting part of Eckersley’s presentation starts about 25 minutes in where he discusses how the initiative plans to address issues surrounding vulnerabilities related to the Certificate Authority system itself.
The only thing I see personally that I wish Let’s Encrypt supported right out of the gate is Wildcard Certs, but Eckersley indicates in the Q&A session that they will be looking into things like Wildcard Certs after they’re certain the basic functionality of their CA is rock solid.
https://www.youtube.com/watch?v=pd-h8WOiI8A