downloaded the german dump, unzipped it on my home pc, copied the files to the n900 and it work great. One downside is the map isn't available offline. Having the whole world offline is probably a bit much. But is there a way that when I go to London I can download the London maps beforehand?

a bug I noticed when testing just now is the wikipedia icons don't appear in f.i. London. There are aticles in the dump on f.i. buckingham palace, but the icon isn't shown. For other locations like f.i. Eindhoven and Berlin this works great. is this a bug in the dump or in the program?

furthermore I would like to suggest that the 'home' button in the map viewer automatically zooms in instead of keeping the current zoom level. If you use the function you are probably interested in the immediate surrounding so an automatic zoom would be nice.