Best of all, when I tried to submit a comment to Google for feedback that might help them, I was directed to log into a Google Mail account.

FORBES: Google Flights? Not Ready For Prime Time.

Google could subsidize the offering by displaying ads when users log on to check their voice mail or manage their accounts.

FORBES: Google Calling

Google Talk requires users to register with a username from Gmail, the company's e-mail service, and uses that mail address as the user's IM log in.

FORBES