twitter from the command line using curl

#!/bin/bash

uid=""
pw=""
maxLen=140
tweet="$*"
len=${#tweet}
if [ ${#tweet} -gt $maxLen ]
then
   echo "Tweet too long"
   exit
fi

curl -u $uid:$pw -d status="$*" http://twitter.com/statuses/update.xml >
/dev/null 2>&1
if [  $? -ne 0 ]
then
   echo "failed to tweet"
else
   echo "Tweeted"
fi