Google released version 2 of Google Voice extension for its Chrome browser (Beta Developer Channel version required). The extension adds a small icon to notify you of new messages and gives you quick access to calling and free SMS via Google Voice.
In addition to the capability of viewing the number of unread messages in your Google Voice inbox and quick browsing them with short excerpt of transcripts, the extension lets you initiate calls and send free text messages by just typing any number or contact name. You can also makes phone numbers on websites callable via Google Voice by just clicking on them.
Note that unlike Skype, the extension does not let you make calls directly from your browser. The extension just initiate the call (as middleman) and connects one of your phones (home, cell,..) found in your Google Voice account to the outgoing number.
Get the extension HERE!