I was quite sure I had put in my thanks to you in a reply I posted yesterday evening but it might have gone to cyber heaven as it is gone now. Anyway, thanks for posting this very informative trip report with lots of nice pictures - the coordinates for all the waterfalls and places to stay and eat will be helpful for people wanting to discover Cambodia and the south of Laos.
Easy to use too. Upload your gpx file somewhere on the internet (GPS vizuliser does not store it for you) and then you go here and put a link to it. Select what options you want if any and click "map it".