Don't get too excited when you see this update notification pop up -- as far as we can tell, it's got nothing users will notice -- but we've just been told by Microsoft that the company is getting ready to send out the first software upgrade to Windows Phone 7 devices in the field early this week. It's being billed as a "minor update to help prepare" for the copy and paste stuff (which we're assuming is still targeted for early- to mid-March, per Ballmer's MWC keynote), though the exact timing of this first one will vary a bit dep
