Scammers use Gmail invite as phishing hook

Scammers have caught on to the allure of Gmail and are using the Google e-mail service for a "phishing" scam to harvest e-mail addresses and passwords.
The "Gmail Team" asks users to give away their Gmail addresses and passwords to get the invites.
For those account holders genuinely given Gmail invites to hand out by Google, a click is all it takes to get a friend onboard. A message saying "You have 6 Gmail invitations. Invite a friend to join Gmail!" appears in the user's status bar, for example.
Why the scammers are after the usernames and passwords is, as yet, unclear. One possibility is to use the accounts to send spam. Another is the potential to search though the e-mail messages for any financial details left lying around in e-mails. With up to a gigabyte of storage per account, that's a lot of e-mail to trawl though.