[CRConrad]

> > Finally, the file system paradigm fails with shared content; you can't save a Google Doc to disk because then how can your friends or coworkers update it?

> Just curious, does anyone know of any hybrid file formats that store information both locally and online?

I'm sure there are better ways to do it, but MS Office can, AFAICS, at least kind of do that: Documents stored in -- wossname, OneNote? SharePoint? One of those, I think -- can be edited in-place by Office Web apps, or downloaded for editing in the regular desktop apps and then saved back on-line and/or locally. If they can do that, I'm sure other apps can also do it (and probably better).