PC Magazine has a review of Windows Mobile 6.1, released today. “Windows Mobile 6.1, the latest upgrade to Microsoft’s main operating system for handhelds, has a few important invisible patches and a bunch of minor interface tweaks. It leaves all of Windows Mobile 6’s core strengths and weaknesses intact. On the positive side, Windows Mobile is still a flexible OS with unparalleled Windows and Exchange support, and the greatest number of handset choices by far. No matter which carrier, manufacturer, or form factor you choose, you’ll find a Windows Mobile device to suit your taste.” Update: Ars reports that Microsoft has announced a desktop-grade browser for Windows Mobile, scheduled for Q3 2008.