Eye-fi

The Eye-Fi Card is a wireless memory card. It automatically uploads pictures from your digital camera to your PC or Mac and to your favorite photo sharing, printing, blogging or social networking site.
It fits in any normal digital camera that uses SD memory cards.

See this video on how to use Eye-fi ::

http://s3.amazonaws.com/Tentoe-Stage/opt/apache/htdocs/Eye_Fi__Inc_/__HTML__/2876/shell.swf

For more information visit :: http://www.eye.fi/
Courtsey :: Eye-Fi, Inc.