is there a way to open/save files directly into Google Drive in the cloud?
Yes, looks like it.
With real time presence for Office files, multiple team members can work on the same file without worrying about version control issues.
https://www.google.com/intl/en_in/drive/features/#tools
more info here.
http://services.google.com/fh/files/misc/five_ways_your_team_can_start_collaborating_with_drive_final.pdf
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