You can always export as open-format files or Office-formatted files. The re-import of those works quite well (including things like excel comments, etc). Int

You can always export as open-format files or Office-formatted files. The re-import of those works quite well (including things like excel comments, etc). Interop is so good I almost don't notice until I run into something like an embedded doc or something I can't open in GDocs (which I then have to download as the office doc to extract).