Last month I worked on a map of all HOT tasks (until January 5, 2016).

The map is available at http://pratikyadav.github.io/HOT-Task-Map

You can read more about it at https://hotosm.org/updates/2016-02-08_the_global_footprint_of_hot

If you are interested in the code and shapefile of the task, then see this repo at GitHub https://github.com/pratikyadav/HOT-Task-Map