The client is. The server will be as soon as it's stable enough.
Do you know you are misleading people? Particularly when you use word "open" and Open Source Initiative logo describing your sistem?
Again, we sign every new ledger, about every 20 seconds.
A new ledger is closed approximately every 5 seconds.
Which one is true?
We designed the system so that people would have good reasons to trust it without needing a central authority to trust.
In practice, most people will use the default UNL supplied by their client.
Seems a little conflicting to me.
I don't know what you mean.
I mean, how new coins of ripple currency are issued?
By consensus.
Do you have hard proof that 1000 nodes would converge to consensus in N iterations in presence of 10 malicious nodes? Do you believe they can execute this N iterations in 5 (20) seconds?
"Technical Description" of consensus on wiki doesn't seem very technical to me.
What about network split? Will it be permanent and not-repairable?