First off, I am not an expert on replication.
That said, I do know enough to realize that your requirements as rather vague.
You want to setup Oracle Advanced Replication, which by all accounts is a formidable task for the uninitiated. Not included are any response time requirements, or descriptions of the network over which replication will be running.
I suggest the following:
* Get a decent book on the subject:
* Setup test systems to understand how it all works
* Hire a consultant with Oracle Adv. Rep experience to
help you build a replication architecture.
my $0.02 worth.