How can you see your photo stream for iCloud online ?

Sorry, you can only publish Shared Photo Streams online, but not "My Photo Stream".

This is the list of ways to view your My Photo Stream: See http://support.apple.com/kb/HT4486

How do I view My Photo Stream?

• iPhone, iPad or iPod touch: Your photos will appear in the My Photo Stream album in the Photos app. If you're using iOS, you can find your photos by tapping the Photo Stream tab, then tapping the My Photo Stream album. In iOS 5, your photos are in the Photo Stream album.
• Mac: Your photos appear in the Shared albums section under iCloud in iPhoto 9.5 or Aperture 3.5. In earlier support versions of iPhoto and Aperture, your photos appear in the Photo Stream section. In iPhoto 9.4 or later or in Aperture 3.4 or later, open the My Photo Stream album.
• PC using Windows 8.1: From the Start screen, click the down arrow Down arrow in the lower-left corner, then click the iCloud Photos app.
• PC using Windows 8: From the Start screen, select iCloud Photos (or Photo Stream in iCloud Control Panel 2.0 to 2.12).
• PC using Windows 7: Click the Windows Start button, then click Pictures. Click iCloud Photos or Photo Stream under the Favorites menu in the panel on the left. Double-click My Photo Stream to view your photos.
• Apple TV: After signing in with your iCloud account, you can view your photos by choosing iCloud Photos or Photo Stream from the main menu (or selecting Internet > Photo Stream in Apple TV Software Update 5.0).

-- Léonie