I was at #trainhack London on 13th October 2012 building 'Things To See From Trains'.
I also suggested building a spread betting application for train journeys, which sounds like a fun thing to do, but difficult to get a gaming licence for! If anyone wants to build it for a laugh, then be my guest.
My company, Argyll Environmental, were instrumental in persuading High Speed Two Ltd to release the data of the proposed track. They surprised us by going the whole hog and giving it an OGL. I built the Argyll High Speed 2 report https://www.argyllenvironmental.com/uploadedFiles/Other_Services/SITESOLUTIONS_HIGHSPEED2/High_Speed_2_Specimen_v11_999997.pdf which is sold during property purchase transactions in the UK.