>>Now all I need is something like ViewRanger or similar to display OS maps on the N900

Quickie for others who are looking for a a good way to view Ordnance Survey maps on their N900 (in offline mode)
I'm using the method outlined here: http://blog.absorb.it/2011/01/26/map...ad-for-mappero

Basically, on the PC:
* Download and run Mobile Atlas Creator: http://mobac.dnsalias.org/
* Select "OS Explorer Maps" as the source
* Set Atlas Settings format as "OSMTracker Tile Storage"
* Select area in map view/set zoom levels/add selection/create Map
* Copy the atlas structure (the numbered directories with the png's in them) from PC to /home/user/.maps/OpenCycleMap

On N900 Open Maep (or Mappero/eCoach/anything else that uses the above cache location) and choose OpenCycleMap as the map source.

When you move to the right area/zoom level, you'll get the Ordnance Survey maps you downloaded (instead of the OpenCycle map) ...OK, it's not the cleanest/nicest method, but it works, and works well.

Extra points for running Mobile Atlas Creator on the N900 itself

PS: I've used OpenCycleMap as an example storage area, but you can use GoogleMaps or something else if you prefer...

PPS: Thanks for the Grid converter, Dr. Random...