If you ask any recovering Twitter-aholics from the real world about Twitter, all you'll hear is about how it's dying. It's a good thing then that poker players continually defy the odds and have created their own world where Twitter thrives. Just think how boring the World Series of Poker would be without it.
In general, poker players understand Twitter much better than the rest of the world. There's a little drama (think Doug Polk vs. Alec Torelli), some name-dropping (think Phil Helmuth), plenty of snark (think Barny Boatman), and the occasional tournament update (think of anyone that has made a final table).