tasos

I don’t really nead all the features of a CMS or Blog system.
Most of them have the same cool features, I’m looking for something:
– Scalable (load/Traffic Capability)
– Robust (less bugs)
– Multiple site Deployment (One codebase for multiple sites)
– Easy to deploy, plugins, active dev community
So far I am down to:
Apache Lenya, MovableType, Blojsom, PostNuke, XOOPS, TYPO3, WebGUI, mambo, Slash, Nucleus, WordPress.
I would like to integrate it as an enterprise solution for a client with multiple sites, not for a personal site.
I was wondering if you guys could share your thoughts about those. Thanks