How to delete photos in iCloud Photo Stream
After upgrading to iOS 5 in both my iPhone & iPad, one issue I have been struggling was with Photo Stream – the automatic sync service of photos across iOS devices & PC/Mac. The issue was how to get the sync done to Windows PC faster and how to delete photos in the stream. There is no feature available for editing or deleting the photos in the Photo stream. Then I saw this Apple support article that says how you can reset and get all the photos deleted in the stream.