JSONP Services
http://apiwiki.twitter.com
http://www.flickr.com/services/api/response.json.html
http://code.google.com/apis/gdata/docs/json.html
http://code.google.com/apis/gdata/docs/directory.html
http://developer.yahoo.com/maps/rest/V1/geocode.html
http://developer.yahoo.com/finance/company.html
http://code.google.com/apis/youtube/overview.html
http://www.bing.com/developers
http://msdn.microsoft.com/en-us/library/ff701702.aspx
http://msdn.microsoft.com/en-us/library/dd250882.aspx
http://ws.geonames.org/searchJSON