Currently Being ModeratedApr 1, 2013 9:08 AM (in response to Lesliefitch924)
iCloud only uploads photos to photo stream that are added to your camera roll after turn on photo stream. Earlier photos are not uploaded. Also, photo stream photos don't use your storage plan.
Camera roll photos are only included in your iCloud backup, and as such can only be later accessed by restoring the entire backup to your phone. Also, if you back up your phone, then delete the camera roll photos from your phone and contine to back it up, you will overwrite the existing backup that contains the photos and they will be lost.
If you want to keep your photos and free up space on your phone, you can't use iCloud to do this. Instead, save your photo stream photos to your camera roll (if they aren't already there) by tapping Edit, tap all the photos, tap Share, tap Save to Camera Roll. Then import your photos (and videos) from your camera roll to your computer and delete them off your phone, as explained here: http://support.apple.com/kb/HT4083.
Currently Being ModeratedApr 1, 2013 10:31 AM (in response to Lesliefitch924)
The main My Photo Stream is also limited to 1000 photos at a 30 day limit. It is intended to be used to sync photos to other devices rather than a backup.