www.twitter.com - it is free! There is also an Android app.
Here is a tutorial:
And here is the Daily Paul's twitter feed:
Things on the front page automatically go on the DP's twitter feed.
Lots of DPer's are on twitter. Once you get started, you'll have a lot of fun with it, I'm sure!
Good luck! Don't be a twit! ;-)
He's the man.
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