The M600 from E-TEN builds on an earlier series of Windows Mobile handhelds, the most recent of which, the M500, we looked at back in June of this year. Like its predecessor, the M600 is a connected Pocket PC, available SIM-free. Also like the M500, it is small and bulging with clever software. The M600 also rectifies one of the most annoying issues with the M500 by adding Wi-Fi support. And of course, it runs Microsoft's latest Windows Mobile 5.0 operating system.