When installing the S3 tools you will be prompted for path to GPG tools.
You will have to install the GNU PG tools located here: http://www.gnupg.org/
Download the source from:http://gnupg.ca/download/
Extract, configure, make, make install as root or sudo.
When you specify the file for GPG in S3CMD –configure you have to enter /usr/local/bin/gpg not just /usr/local/bin.
Do a ls of the iphone bucket at s3://iphonevideos, select a video and download it to the sonofmmm instance. Make sure to put the url in quotes like 's3://iphoneclassvideos/Xcode, Finding Help, Debugging (January 15, 2010).m4v' so punctuation will be interpreted as part of the path.