Kivo looks a lot like DocVerse. Which was eventually bought by Google and became Google Cloud Connect[1].

Google Cloud Connect was supposedly replaced with Google Drive[2]. No idea if it offers the same functionality. There may be 100,000s of people missing Google Cloud Connect which just isn't enough of a market for Google to pursue.

Personally, I don't think the problem is lack of tools or a better way than email. It's just lack of training or willingness to do something different.

[1]http://googledocs.blogspot.com/2011/02/google-cloud-connect-... [2]http://support.google.com/a/bin/answer.py?hl=en&answer=30170...