Not quite sure of the best way to contact you!
I run a walking website, which includes a mapping server for routes, currently serving tiles licensed direct from the OS. I'm interested in replacing the OS with a combo of Landform panorama contours, Vector Map District basemap and further data (e.g paths from OSM.)
I was very interested to stumble across this page on the website for your app (I only have an android phone): http://www.trackmyjourney.co.uk/opendatacomposite.php - looks like you've done alot of this sort of thing already.
Is there a chance I could see a sample of what this map looks like in parts of Scotland? What's the best way to get in touch?