What's the current status for subversion replication?

Hi,

What's the current status for subversion servers replication? Does it
allow read/write on both master and slaver sides? Is it stable enough
to put in real life use? I plan to do it for supporting concurrent
development in different GEO locations, what is the right manual I
should go to read, is it the "SVN Book"?

Thanks in advance.

-- 
Life is the only flaw in an otherwise perfect nonexistence
    -- Schopenhauer
narke
public key at http://subkeys.pgp.net:11371 (narkewoody@gmail.com)