I just came across this list of XMPP servers, which rates their
security and was disappointed to note that jabberd.eu, which I've been
using, scores F on both counts.
jabber.ccc.de doesn't seem to be on the list but I've had problems
with logging into that with two different accounts I tried creating,
so haven't used that. Jit.si doesn't appear either.
Anyway, thought others might find it useful when choosing a server.
Maybe it would be good to have a link to it on the Jisti Homepage and
try and make sure only those rated AA are included in the "Create new
account" list in Jitsi?