And going to Tina Brown’s Newsbeast in April. Writes Andrew:

For me, it’s a strange mixture of excitement and sadness. Sadness because the Atlantic has been a very special home for me and all the interns and staffers who have worked at the Dish. The more than four years that I’ve worked here have been the most rewarding, exhilarating and challenging of my career. I cherish my colleagues, their support and debate, and will miss them deeply. But be assured, I’ll continue to link, debate and argue with the team here, and remain immensely grateful to editor James Bennet and chairman David Bradley for their never-faltering faith in what we’ve tried to do. The Dish is almost unrecognizable from what it was four years ago – and that experimentation, growth and creativity were all made possible by the Atlantic. I also have a profound attachment to the magazine’s history and legacy and integrity, which makes leaving hard. But I am very proud to have played a part in the Atlantic’s self-reinvention in this period and its first profitable year in memory. To have played any part in perpetuating this legacy in an environment that has been as tough on magazines as any in memory is an honor I will cherish to the end of my days.

Sullivan began his blog in 2000. In 2002 he moved to Time; in 2007 to the Atlantic. There he was the cornerstone of the Atlantic’s online blogging network. He is credited with much of its success. He hopes to repeat that for Newsbeast:

The chance to be part of a whole new experiment in online and print journalism, in the Daily Beast and Newsweek adventure, is just too fascinating and exciting a challenge to pass up. And to work with media legends, Barry Diller and Tina Brown, and with the extraordinary businessmen Sidney Harman and Stephen Colvin, is the opportunity of a lifetime. Barry was the person who first introduced me to the Internet in the early 1990s, and we have remained friends ever since. Tina Brown needs no introduction, but to see her in action as we have discussed this new adventure over the past few weeks has been quite a revelation. The Daily Beast, in a mere two years, has made its mark on the web, with 6 million unique visitors last month, and an eight-fold jump in ad revenue over the last year. It will give the Dish a whole new audience and potential for growth and innovation. I’ll also be contributing columns and essays to Newsweek.

No need, even, to change your bookmarks, “you’ll be automatically redirected when April 4 comes around.” No word on RSS feeds.

Sullivan is as good a blogger as there is. Diller and Brown seem a great match. I look forward to seeing what they’ll do together.