sorry to come late to the party, as I discovered the wlan timeout problem the hard way after trying for a couple of days, downloading maps overnight it would always die near the same amount retrieved. the different between each attempt being how long I played with the tablet before putting it down and its subsequent automatic disconnection. told it to never timeout and (after a very long time) it did it!

the other gotcha is that, on an n800, it will download to the internal card whether or not there's enough space. you can exit wayfinder, move the maps folder to the other card and it will detect the new location automatically.