Chuck's a huge Twitter fanatic. I'm not so much but I know a lot of folks do and it seems to be gaining popularity. I might have to add four more folks as it seems the four Survivors of Left 4 Dead are also twittering. Just add louis_l4d, zoey_l4d, bill_l4d and francis_l4d and you'll soon get updates to your Twitter account about their actions as they stroll through the zombie apocalypse. I recommend Cobra Commander as well even though it's not game related.