Seven months after he was named business editor of the Mercury News, Todd Woody is leaving to take a job as assistant managing editor of Business 2.0, an Internet site based in San Francisco. Randy Keith will lead the business department until a replacement is hired. Woody joined the Mercury News as an assistant business editor for technology in 2003, was promoted to the deputy business editor post in 2004 and named business editor in October 2005. Previously, Woody worked for the Sacramento Bee, the Industry Standard and wrote for Wired magazine. He began his newspaper career as a reporter at The Palm Beach Post. He received his bachelor’s degree in politics from the University of California at Santa Cruz and a master’s degree in journalism from Columbia University. A month ago, the Merc’s business section received an “overall excellence” award from the Society of American Business Writers and Editors.