Geo redundant OSS database

[Bryan Sant]

Pluggers,

Has anyone had any experience working with PostgreSQL or MySQL in a
geo redundant configuration (replication/clustering)?  I see that
MySQL has MySQL Cluster
(http://www.mysql.com/products/cluster/)--which is their "Carrier
Grade" offering.  Looks compelling.  I know that PostgreSQL (>=
version 9) has clustering as well, but I'm not sure how feature
complete it is.  I'm interested in any insights you might have.

Thanks,
-Bryan