A OneBox is a summary of your orkut profile, including key details like your name, photo and location. A OneBox appears only when someone who is logged in to orkut performs a search on Google.com for another orkut user. Keep in mind that this project is still in its experimental stage, so for now, only a small percentage of orkut users will see the OneBox in their search results," mentions Google in orkut's help center.
In the privacy sections of the settings page there's an option that lets you remove your profile from the orkut OneBox, but the description doesn't correspond to the one from orkut help center: "show my orkut information when my orkut friends search for me on Google.com". so if you want to opt-out, just change the setting here.Google, Orkut, OneBox, Internet Profiles, Search, Web Search, Search Result, Indexing, Search Engine