comp.lang.javascript - join
Netscape Communications Corp.'s JavaScript language.
High activity, 8271 subscribers, Usenet

Google Maps Help Group - join
Welcome to the Google Maps Help Group, where you'll find answers from expert users and even our own Google Maps Guide (a Google employee). If your specific question isn't answered here already, you can post it and let the experts weigh in. Before you get started, please read our charter at http://www.google.com/help-charter/maps
31564 members

Google AJAX APIs - join
The official developer forum for the Google AJAX Search API and Google AJAX Feed API.
Low activity, 5201 members

ajax-web-technology - join
This group is for the people who would like to spread the knowledge on AJAX Web Technology...
Low activity, 2016 members, restricted

Google Calendar Data API - join
Share thoughts with other Google Calendar data API developers.
Low activity, 3465 members

iGoogle Developer Forum - join
This is a discussion forum where you can exchange ideas and information with other iGoogle developers.
Medium activity, 5713 members

google.public.web-apis - join
This is the discussion group for questions about implementing the non-commercial, beta Google SOAP Search API.
Low activity, 1560 subscribers, Usenet