I would like to use this sort of facility for my walking log. At the moment, I use EveryTrail which uses Google maps. I would much prefer to use OS maps and I have an extensive set of Anquet maps. However, the one thing that EveryTrail does which your system and Anquet does not do (as far as I can tell at the moment - I have only just looked at it) is to be able place photos on the map where they were taken either by geotagging or using the time of the photo and matching it to the time of the track. Have you any plans for this?