MySpace's messaging interface may soon take a turn for the better - and/or the Facebook-like. Late yesterday, MySpace acknowledged that it's acquiring the assets and team of Threadbox, which deals in real-time social messaging and takes some amount of pride in comparisons to Facebook. A short statement on the Threadbox homepage tells what the company's service is all about in reasonably objective terms, explaining, "Threadbox Messenger combines the convenience of email,