Yes, Google Voice for the iPhone is finally here, albeit as a Web app, allowing you to place calls from your Google Voice number, send free text messages and view transcribed voicemails. While most of the app's core functions remain intact, there are certain limitations to the Web app.
The new Outlook plugin will allow you to see the profile of any contact before you go on sending mails to your contacts. With this new plugin you can go ahead with writing a mail and the profile info for the contact will be displayed in a sidebar pane just next to the mail itself.