ok... you can download the Replication Server from http://www.pgsql.com/download/rserv-0.1-pg7.0.tar.gz
and you can read the press release from http://www.pgsql.com
there are many projects for postgresql replication, but this one seems to be the "official" one.
May be you like mysql, maybe you like pgsql. Maybe you like linux, maybe you like *bsd.
I personaly love FreeBSD+pgsql, but it's just me.
I think that the cool thing is that we can choose what we like.