The only types of data you can add to a web map are: services (map, feature, wms), KML files, zipped Shapefiles, CSV files, and GPX files. These types can be added directly to the map from the Add menu button when viewing a map. Here's some information about creating maps:
http://help.arcgis.com/en/arcgisonline/help/index.html#/Creating_maps/010q0000001n000000/
Thanks,
Mike
Mike, thanks for the reply. I went back into ArcMap for Desktop 9, and was able to export my watershed as a shapefile. Unfortunately, it saved SEVEN different files!!! They have extensions of .dbf .prj . sbn .sbx .shp and another .shp and .shx. I zipped all of them into a single zipped folder, and uploaded that to My Content. It still won't let me add it to my map.
Is there a particular way I should zip this stuff up? Thanks for any help, Chris
I had an area that I wanted for an overlay from a jpeg. I saved my lyr in ArcMap. From this discussion I thought I could use the toolbox in ArcMap to convert to KML and then add to my ArcGIS Online map. It looks like it worked. I am working on an online illustrated map from a Photoshop image to 'smooth' two map schemas used. Thanks for the hints!