I have two dumb questions:

1. Why can't flash thingies like the ones for streaming video on uStream, Justin.tv, Seesmic, etc. recognize and use the camera on the N810?

2. Is there a good entry-level explanation on how to use GPS and POI data (in general) and the maps app on the N810 specifically?

3. How and where can I get maps (POI data?) for Tokyo that is supported on the N810?

With the Map application, it is straightforward to add favorites (and they are stored in the file /media/mmc2/map/mapdata/favourites.txt, which is just a text/plain file with the coordinates and the title). If one needs to import data, I don't know what are the 3rd (always 0 here) and 5th (seems to be a MD5 sum) fields, though. However I'd like to know how to add new categories and POI's in these categories.

http://www.poiplaza.com/ is a free database with more than 1 million POI's. I've never tried it, though. I've found it with Google.