Office 2013 has a great new feature where cloud storage services can register as a place within the open/save menu, and within the user's account. While we wait for Dropbox to officially support this, I have a workaround for those people using Office 2013
who need to see the Dropbox icon beside SkyDrive.
The script that you can download and run is here:
https://dl.dropbox.com/u/46565/dropbox_service_add.bat
It modifies the registry based on Microsoft's document, "Integrating additional cloud storage services in Office 2013" found at http://www.microsoft.com/en-us/download/details.aspx?id=35474
I've only tested this on Windows 8, so if somebody on Windows 7 can let me know how it works that would be fantastic.
The thread where I'll be posting any updates or changes is:
https://forums.dropbox.com/topic.php?id=93098
Cheers,
-Philip