OT: Client-based CMS

[Michael Hipp]

Does anyone know of a CMS (content management system) that runs on the 
client instead of the web host?

Apologies if that sounds like a dumb question, but I've been looking at 
quite a few CMSs but they all seem to run on the host. This has 2 
distinct drawbacks:

1) It requires that you have control over the host (or a very 
cooperative web host provider).
2) It eliminates any possibility of working on content offline.

Thanks,
Michael