Former Seinfeld and current Curb Your Enthusiasm funnyman Larry David has cautiously waded into the brackish waters of social networking. Late Monday, the writer, actor, and producer sent out his first dispatch to the Twitterverse.

And it’s a demand.

“I was told by Charity Bribes that if I Tweeted they’d give 10K to the NRDC….Pay up!” he said a few hours ago.

It’s really David. The account has been verified by Twitter and his assistant told the Washington Post that yes, it’s really him. So, why is David now on Twitter and what’s he going on about – bribes and such?

You have to go back to early April to figure this one out. Back then, we told you about a startup called “Charity Bribes.” Their goal was simple – to crowdsource the bribing of celebrities for a good cause. It’s pretty simple. People go online and pledge any amount of money to see a celeb complete a particular activity. What celeb and what activity is determined via voting on the site. The most popular idea has a month to garner donation pledges.

If the celeb ends up completing the bribe, all of that pledged money goes to a pre-selected charity. If they don’t act on the wishes of the masses, no money goes anywhere.

The first bribe offered up by the site was to Larry David. It was simple – all the bribers wanted him to do was to join Twitter.
And although he didn’t quite join within the (first)30-day session, the pledged money will still end up at the National Resources Defense Council.

From the Charity Bribes blog:

Thank you to all the bribers for your generous contributions. The total amount of $10,163 will soon be donated to the NRDC. We’ll keep you updated. And, of course, thanks to Larry David for taking the bribe and making our track-record of extortion a perfect 1-for-1.

Back in April, I told you that I thought Charity Bribes was a terrific concept. The only problem was gaining enough press to make other celebrities (future bribe targets) take notice. Now that David has accepted to bribe, the service will hopefully raise even more money for various charities in the future. Let’s also hope that David keeps up with the Twitter thing.

Next up – Conan O’brien. If he interviews a guest on this show wearing an eye patch and a turtleneck, Austism Speaks will get some donations.