Anyone use MySQL replication with their wordpress installs?

I just setup a test wordpress install using HyperDB plugin for MySQL replication via Tungsten Replicator replication and it seems to be working okay.

Wondering if anyone is using MySQL replication with their wordpress blogs ? Care to share your experiences positive/negative ?

Since this is just a test installation, was wondering what issues other wordpress/mysql replication users have come across on live production installs ? And how have you resolved them ?

thanks

George