Conan O'Brien's on Twitter -- and so are these hosts

Want to keep up with Conan O'Brien? He's got a brand-new (verified) Twitter feed -- and despite the fact that he's only posted one tweet so far ("Today I interviewed a squirrel in my backyard and then threw to commercial. Somebody help me."), as of this writing, he's already racked up over 50,000 followers.

Proving once again that Coco is the choice of the 'net generation, Jay Leno's had a Twitter feed for ages -- and he only has about 30,000 followers. (Jay doesn't Tweet himself; most of the content simply plugs the show. Sample tweet: "Recently Jay shot another fun promo for The Tonight Show. Here’s a sneak peek of Jay in his red-hot outfit!")

David Letterman has spoofed Twitter on his show, but the "Late Show" Twitter feed has the same written-by-publicists feel as the Leno feed (and it only has about 15,000 followers).

Craig Ferguson is a Tweeter, and over 100,000 people have signed up to read his witty remarks ("Morning Twitzylvanians. I woke up hungry. I think I need a sausage this morning....then breakfast. Sorry. I can't help myself.").

The most popular late show host on Twitter? Jimmy Fallon, with a whopping 2.5 million followers. His feed is a combo of monologue jokes ("The US Curling team has its own official condom. But the most effective method of birth control? Being on the U.S. Curling team."), guest updates and little messages from Jimmy ("I'm doing what every 35-year-old male is doing - watching the Teen Mom finale on MTV.").

Second most popular? That would be Stephen Colbert, with almost 1.5 million followers. I'm guessing the faux pundit doesn't write all of his own lower-case tweets, but they are funny nevertheless. ("to me, the great white north will always be ollie.")

Most of the talk show tweeters don't have time to engage with their audience, but Jimmy Kimmel sidekick Guillermo frequently responds to his fans on Twitter. (The Kimmel show has its own promo-heavy feed.)

Other late night Twitterers:
"Lopez Tonight"
Carson Daly and "Last Call"
Tavis Smiley
"The Wanda Sykes Show"