The phishers are getting more sophishticated (sic) and i've seen some good ones come through. They are targeting big and small services in the hope that they discover usernames and passwords, allowing them to log in elsewhere.
On Monday, Twitter sent a memo to major media and news outlets about the threat — if they hadn't known already or at least reported on some of them — and noted that it believed these "attacks will continue."
Twitter acknowledged that the "incidents" appear to be "spear phishing attacks that target your corporate email," that appear to be legitimate emails and are often sent directly to the account holder.
The memo also noted: "Don't use this computer to read email or surf the web, to reduce the chances of malware infection," and to "minimize the number of people that have access" to accounts to prevent human error.Twitter Warns News Organizations Of More Phishing Attempts [zdnet.com]
Earlier story
AP Twitter Account Phishing, Fake Tweet Falsely Described White House Explosions [webmasterworld.com]