Geofabrik labs is where we keep our and the OSM community's play things that are not yet ready for prime time, or perhaps never will be.

Maps and Data for Crisis Regions

http://labs.geofabrik.de/nepal/
(Older regions discontinued. See normal extracts on download server.)

These differ from what we normally have on the download server in that they are done every hour and not just every day, and we also have direct Garmin downloads for the crisis regions.