OSM Page: http://wiki.openstreetmap.org/wiki/Map_Features#Name
http://wiki.openstreetmap.org/wiki/Tag:landuse%3Dpond
http://wiki.openstreetmap.org/wiki/Talk:Key:water#Prevalence

See also lake_poly. Question - do we need a tag to differentiate between LINZ lakes and ponds?
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HB: if pond_use=hydroelectric then landuse=reservoir
anything similar for ox ponds and sewage?
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RP: the wiki suggests natural=water, which is clearly ridiculous as these are not natural. i would suggest creating landuse=pond, documenting it, and directly copying the pond_use tag. new tag created.
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Earmarked layer to export using reversed ways.
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HB: I agree with using landuse=pond. Some of these contain oil, industrial waste, and sewage. natural=water doesn't fit. Added sport=ice_skating.