No, Amazon Cloud Drive and Microsoft SkyDrive do not have shell integration. You need to upload using a browser.
Hopefully, Google Drive will be similar to Dropbox wherein, you will have a G-Drive directory in your hard disk. Microsoft has a similar product too - it is called Live Mesh.
Hopefully, Google Drive will be similar to Dropbox wherein, you will have a G-Drive directory in your hard disk. Microsoft has a similar product too - it is called Live Mesh.