The scam is perpetuated via an IM with a TinyURL link that redirects to a ViddyHo login page. That page instructs them to enter their Google account information, which is then used to break into the victim s account and send the link to other users in the victim’s address book or buddy list. Google Accounts, in some cases, are tied to valuable properties Google Checkout, Google Adsense, etc. so a compromised account can lead to financial damage.
Source: https://threatpost.com/gmail-gtalk-phishing-scam-underway-022509/72469/