By Vasudev Ram
UPDATE: It says, at the end of that page about Google's Twitter accounts below, that the page is out of date, and that this is the new and up-to-date list:
Google's Twitter directory
I had just tweeted about the @gmail Google account on Twitter, so thought of searching for more such accounts. Found this:
Big list of Google accounts on Twitter
I think I had come across it earlier, also the post is probably not up-to-date since it is from 2009, but it should provide a good starting point. Also, of course, you can try to identify more such accounts for Google services you are interested in, by just going to http://twitter.com/google_service_name, where you replace google_service_name with the name of the service(s) you're interested in.
- Vasudev Ram - Dancing Bison Enterprises