The tool I'm developing would do a thing similar to when you join Facebook and they ask your GMail username and password and with it they can grab all your contacts.
But my tool doesn't use a browser, therefore it is difficult to get the proper headers. I assume that the Google application (Orkut) checks only my Cookies and Identity(ip, machine name, user-agent) as authentication method. In this case all I need is to get the proper cookies.
I tried to call https://www.google.com/accounts/ServiceLoginAuth?service=orkut with the parameters Passwd=realPasswordHere&[email protected] . But the response was a similar HTML with Set-Cookie: GALX=A9iBuq7y5xU;Path=/accounts;Secure
None of these cookies are the real thing. Have you tried it yourself? Do you know how to do it? Have you ever seen an open source project that does it?