If you write a scrap with a URL in it, Orkut requires you to complete the image verification (CAPTCHA), however if you post any URL within the Google network you are not required to do so, this flaw can be used to post url's bypassing the image verification.

'Orkut' user profile information will now appear in Google search results when someone searches for your name, the result will contain summary of your profile, including key details like your name, photo and location and will be called 'OneBox', according to Orkut help center: