$s3 = AmazonS3::getInstance();
$bucket = $s3->create_bucket('foofoo');

$filename = "test.php";
$fo = new AmazonS3_Object( $bucket, $filename );
$fo->meta = array(
        'reviewedby'    => 'joe,tom',
        'color'         => 'orange'
);

if( $fo->put( $filename ) ) {
        print "upload of {$fo->name} to {$fo->bucket->name} successful\n";
}

// outputs
upload of test.php to foofoo.fileswap.enkryption.net successful