Microsoft isn't saying anything about this one just yet, but there's a growing amount of evidence that the company is set to take on Apple's Magic Mouse with its own Arc Touch Mouse. As istartedsomething reports, that includes a product listing for an "Arc Touch Mouse" at several European retailers (with a $70 price tag), an arctouchmouse.com domain registered to Microsoft in late March, and some Microsoft Research projects that show that the company has indeed been working on multitouch mice since at least
