It's easy to do Twitter posts from the command line, just make sure you have Curl installed and away you go!
curl -u username:password -d status="My twitter message!" http://twitter.com/statuses/update.xml
If you have a Facebook account, you can set your FB account to set the status on that page to mirror Twitter. While there are how-to's for setting other pages by script, it would be nice to see some that are this easy!
