Addicted to twitter

Yikes, I've been on the thing like...a week. I'm already addicted. It's awesome. Mr. Tweet is awesome too. I'm really enjoying Jane Fonda, Jack and Suzy Welch, Ruth Reichel, Mark Bittman and a bunch of other foodies. Vaclav Havel is on there but he never updates. Who else should I follow in the Czech Republic and the EU besides my regular pals(who are already digerati w-a-y before me)?