Photos from iPad to iCloud? I shoot a photo in iPad. I want it will be available in iCloud. How can I do it? I cannot see the PhotoStream in iCloud.

I can see all Pages, Numbers etc documents but not photos, I find this very confusing.
You cannot view your Photo Stream pictures directly on iCloud.com. In order to do this you need to create a new Photo Stream from you iPad, iPhone or Mac (using iPhoto or Aperture).

Here's a guide for doing so. In order to make it public on iCloud.com, make sure you flip the "Public Website" switch.