Currently I am just posting links for using Thunderbird with Lightning Calendar and being able to sync with the Google Calendar with the necessary plugins. Once I get this working smoothly enough that I can describe the process in a short and easy to follow manner, I will. These links point to BETA versions and NIGHTLY BUILDS so if you are not sure, do not use them.http://www.google.com/calendar/embed?src=(username)gmail.com&ctz=America/Chicago(xxxxxGOOGLECODETIMEZONESTUFF)
http://www.google.com/calendar/ical/(user name)gmail.com/private-(xxxxxGOOGLECODE)/basic.ics
Bi-directional Sync between Thunderbird/Lightning and Google Calendar — Now with free tips a tricks 🙂
http://removestringfromobject.wordpress.com/2008/09/26/bi-directional-sync-betwen-thunderbirdlightning-and-google-calendar/
https://addons.mozilla.org/en-US/thunderbird/addon/4631
Calendar:GDATA Provider
https://wiki.mozilla.org/Calendar:GDATA_Provider#Getting_the_Provider
ftp://ftp.mozilla.org/pub/calendar/lightning/nightly/
ftp://ftp.mozilla.org/pub/calendar/lightning/nightly/win32-xpi/