That list of discontinued olympic events in full.
My favourite, cruelly missed out of the OSM list, is still the swimming obstacle race. Apparently Frederick Lane, the Australian winner, had grown up around Sydney harbour and was thus used to clambering over boats. This also meant he knew to climb over at the pointy end, rather than in the middle, which gave him a further advantage…
Also, here are all the demonstration events over the years. Unfortunately there are no demonstration events in Athens, and seemingly none in Beijing either, maybe this could be our USP for the 2012 bid? Bear hunting on Hackney Marshes anyone? Jellied eel eating?