domain names to protect their brand is nothing new, nor is it particularly interesting (unless that company happens to be Bank of America, and the domain in question is BrianMoynihanSucks.com). But, a recent a pair of recent registrations by Microsoft has piqued our curiosity. The folks at Redmond picked up both Microsoft-Sony.com and Sony-Microsoft.com, which has spurred speculation that everything from a Sony-Ericsson WP7 handset to a PlayBox 720 is on its way. The move is worth noting if only because the company doesn't own similar domains, like LG-Microsoft.com or HTC-Microsoft.com. Of course, it could be something as mundane as a joint marketing campaign for Sony laptops or nothing at all -- we'll just have to wait and see.