Wineries subset for San Luis Obispo from 'A Nation of Wineries' http://www.nytimes.com/interactive/2013/07/07/business/a-nation-of-wineries.html
data source>selected within San Luis Obispo County via QGIS (Vector>Research Tools>Select by Location) and saved as wineries-slo.geojson
I used @aaronlidman's osm-and-geojson to convert to .osm ...one small caveat, ampersand's had to be replaced with and (Find & Replace in a text editor) because JOSM was throwing and error upon opening the converted .osm. I load wineries-slo-working.osm for reference into JOSM and delete the points I have researched, reviewed and/or edited in OpenStreetMap; this file is temprorarily here only for my tracking purposes.
wineries-slo.csv is my progress