Documentation of Percona XtraDB Cluster

I`ve found only one documentation _Manual.html
But I have not found
description of all possible server options (new, relative to the classical version)
describe the monitoring, administration of the cluster itself.
As an example: how to learn on the node his condition …

Percona XtraDB Cluster is based on Galera replication library.
You can find information about related configuration parameters here: [URL][/URL]

is their a documentation on setting up a cluster on ubuntu 10.04 LTS? i am trying to follow the document ( desec2.html) but it is not details enough…in terms of how to upgrade in place? or upgrade from mysql 5.1…etc