On my Android phone I use Dropbox to automatically upload my photos to my cloud storage and the latest update for the iOS version of Dropbox adds automatic photo uploading. Dropbox is a really nice service and this makes it even more useful.
The app is free from iTunes
What’s New in Version 1.5
• Automatically upload photos and videos using Wi-Fi or cellular data plan
• Earn up to 3 GB of extra free space for uploading photos automatically (in 500 MB increments)
• See all the photos and videos you’ve uploaded to Dropbox in Gallery view
• Move and delete sets of files at once
• Upload files of any size