Andrew McGlashan via luv-talk wrote:
You can have up to 100 domains (including sub-domains)
in the one
certificate with letsencrypt.
FYI, IE7 only allows 9 dns_name attributes.
Not sure about newer versions.
Last tested 2011-04-28.
Anywhere that you might need a cert,
you can almost certainly use one from letsencrypt.
Not for me; my servers are airgapped and letsencrypt design assumes
the signing server is always reachable. :-)