Google is tight lipped about Google Drive service, it is supposed to release in this month if the rumors are true. But there is no official conformation or indication of it being launched this month. Although it is not launched for the public Google might have launched the same for select partners.
The Verge published a screenshot of Lucidchart showing Google Drive integration into their application. Lucidchart is an online drawing and flowchart tool. Lucidchart added a link to Google Drive integration page to its control panel and removed later. The integration will allow their users to automatically sync documents they create to cloud by linking to Google Drive account. Verge also notes that Lucidchart's CEO is Ex-Googler.
Is it the indication that Google Drive is already launched for select partners or developers before the launch to the public?.