Distribute Database to Multiple Servers

I wanted to know whether it is possible to spread the databases across multiple database servers using MultiDB plugin.

I have a feeling that they can be placed in multiple database servers by specifying the appropriate db host in the wp-config.php file. But I want to confirm it from more experienced and expert guys like you before I proceed.

Even if I'm distributing my databases across multiple servers, are the files for each blog still being put on the original server?