Engadget is live blogging Steve Jobs' keynote at Macworld.

One of the early highlights is photocasting - photos delivered via RSS. Another is a podcast studio tool and a third is a blogging tool called iWeb. More from Macworld.

About the Author:
Steve Rubel is a PR strategist with nearly 16 years of public relations, marketing, journalism and communications experience. He currently serves as a Senior Vice President with Edelman, the largest independent global PR firm.

He authors the Micro Persuasion weblog, which tracks how blogs and participatory journalism are changing the public relations practice.