Dropbox lets you share your photos, documents, videos and files across different devices/gadgets anytime anywhere!. And, its free!!.
Once you install the Dropbox client in your PC, a Dropbox sharing section will be created, and your photos, videos, docs will even be available in your Android smart phones and iPhone.
You can download the Dropbox app for android from the android market. This can also be used in Android loaded Tablet devices. Watch the drop box introduction video
Similarly the Dropbox app for iPhone and iPad can be installed through the iTunes stores.