[cmwright]

For my previous use cases, it's ideal for dynamically created subdomains of a web application. If I know ahead of time, it's easy to grab a cert for any subdomain. However if a user is creating subdomains for a custom site or something similar, it's much nicer/easier to have the wildcard cert.

[medmunds]

The lets-encrypt demo makes it look like you could easily script cert acquisition for new subdomains. And the CA domain validation appears to be totally automated (and fast).

[X-Istence]

The downside is that now I have to manage and deal with multiple certs for all of my sub-domains, rather than dealing with a single cert/key pair.