Openbazaar Technical question about Libbitcoin server

[miguelmorales85]

Hi, I've been setting up a store in Openbazaar and I have a server running version 1.0 while 2.0 come out of beta.
I can see in the log the following message:
 [CRITICAL] Libbitcoin server offline

Can someone explain what is the relation between Libbitcoin server and Openbazaar ?

Does openbazaar only work with its own libbitcoin server?

I have seen its most of the time down. This is a downside to this wonderfull and with great potential project.
one should be able to set its own libbitcoin server and point it to Openbazaar.

This smells like centralization.

Hope someone could clarify my doubts. thanks