Google AdWords account phishing attempts is nothing new. We reported them numerous times in the past, and then stopped reporting all the cases. Even Yahoo Search Marketing has their share of this issue.
A new type of AdWords phishing attempt has been reported at WebmasterWorld. This one is targeting My Client Center accounts, which are accounts that have control and access to multiple AdWords accounts. So if someone gains access to a My Client Center account, they can potential damage a multitude of accounts.
The domain they are taking unsuspecting users to is google-ob.com. So please Beware!
Forum discussion at WebmasterWorld.