Yesterday, I reported at Search Engine Land that Google Officially Adds Docs & Spreadsheets Integration With Gmail, based on Google's announcement. I wanted to be clear that it does support Microsoft Word and Excel documents, so I have been tracking a Google Groups thread, where a Google representative confirms that if an email with a Microsoft Word or Excel file is sent to your gmail inbox, it should show, "Open with Google Docs" or "Open with Google Spreadsheets."
When I try from my Mac, sending a Word or Excel document from Microsoft for Mac, it does not show me the option in my Gmail account. But if it did, it should look like:
Technically, Google is importing and converting the Microsoft document into a Google formatted document.
Forum discussion at Google Groups.