[Plugin: Domain Mapping System] Is this working on 3.4, or is there another plugin that does this?

This is exactly what I need. Unfortunately, I have a brand new WordPress Install and so it’s 3.41.

Normally, I’d just test it and see if it works, but I don’t want to hack my domains before I know it will.

Please let me know if this works, will soon, or if there’s a different plugin to do this?

http://wordpress.org/extend/plugins/domain-mapping-system/