You should be able to email them no problem or use the help menu on one of their products.
Download it from: http://www.google.com/talk
Google Talk is Google Messenger that we people use to communicate online.
You can download GTalk from here: http:/dl.google.com/googletalk/googletalk-setup.exe
The two pages are practically the same. The arrangement of icons and content are visually identical. The only difference that I could find is the language.