[qrmn]

I gather they're not launching with ECDSA certificates (and obviously not with EdDSA or whatever comes out of CFRG, because that's still being discussed by the IETF/IRTF), but they're going to add it later. Any idea when?

What's the hold up; HSMs that'll do secp256r1?

Because of the huge performance improvement ECDSA brings over RSA, I know I'm not going to be deploying Let's Encrypt certs until I can get ECDSA ones (as well as RSA ones, presumably).