Unrecognized iPhone using my iMessage Account?
I just noticed (and dismissed before I thought to get a screen shot of it) a dialog from iMessage stating that an iPhone device that I don't recognize (called 'watchento iphone') is using my imessage account. First thing I did was to change my Apple ID password to another strong password. But now what do I do? Can I disable iMessage/Messages on devices I don't have access to? Any help is appreciated.
Apple iMac , Mac OS X (10.7.2), Apple MacBook Air, iPhone 4