Gamin-Asus had announced their second nüvifone late last week before Mobile World Congress, and we got some time to play with it here at the show. Although there’s been a saddening lack of new Android devices here at the show, Asus has already confirmed that they’ll be doing something with it this year – the fact that the M20 is packing Windows Mobile shows that the nüvifone series will be hopping across lots of OSes. They’re pitching the M20 as an enterprise e-mail device, but as you can tell from the video, it’s a bit hard to swallow without a physical keypad. Regardless, the M20 is extremely slim and compact, while still offering all of the handy GPS-centric services of its bigger brother. The two should kick off the brand in the first half of this year, with more form factors on the way before 2010.