In an early morning memo on Thursday to all staff of Newsweek and its web companion, The Daily Beast, editor-in-chief Tina Brown announced that the last print edition of the 80-year-old magazine will be its Dec. 31 issue. In a move she called "a turn of the page," Brown said Newsweek will transition to an all-digital format early in 2013. The new publication will be renamed Newsweek Global and "will be a single, worldwide edition targeted for a highly mobile, opinion-leading audience who want to learn about world events in a sophisticated context," she wrote. "We are transitioning Newsweek, not saying goodbye to it." Brown added that "regrettably," a reduction in staff is likely as the company streamlines editorial and business operations in the U.S. and abroad. Some initial reactions from the Twittersphere:

First a bit of context from Poynter, the nonprofit school for journalism:

And from The Wall Street Journal:

The New York Daily News' Meena Hart Duerson: 

Guardian reporter Richard Adams is less wistful:

National Review writer Jonah Goldberg:

Ad Age's Jason Del Rey:

Jillian C. York of the Electronic Frontier Foundation:

BuzzFeed's McKay Coppins:

And don't miss BuzzFeed's look back at 80 years of memorable Newsweek covers.