I am currently very interested in JSON because it has proven to be essential to create AJAX applications which can work in compiled HTML help files and help collections. I have already added some fully functional applications to my Notes; a RSS reader, an IP address lookup page, a page to get the weather from the National Weather Service, and a page to get postage rates from USPS. Some of these widgets require a proxy service running on my local web server to make remote requests for XML which is then converted to JSON. Now I should be able to add some custom web services to my JSON data sources. Google and Yahoo also provide many web services which can provide data in the JSON format.