1) Orkut claims irrevocable unlimited license rights to everything you post. Most people don't understand what that means. One example of this is that many of my friends have posted pictures that I've taken. This is probably not a problem, generally, but they've granted Orkut a license to use them without consulting me, and created a legal tangle should I have a problem with that, forcing me to have to perform a legal struggle with Orkut, because of their unwitting actions. I think this is rude behavior on the part of Orkut, but their prerogative to demand.Link
2) Orkut may share personal information with Google in an unrestricted way. Google is unwilling (so far) to discuss what use they may make of that information.
I suspect that Orkut is a way for Google to gather personal information about their clientele for marketing purposes, and to try to form a more solid relationship beyond "I just use Google for search because it's convenient". This is not terribly nefarious, but the kind of data that could be collected to do so has wide potential for abuse, and people should be aware that that's what's going on. Some may not care, but many people I know are signing up without reading or understanding the implications of the above three points.
Boing Boing editor/partner and tech culture journalist Xeni Jardin hosts and produces Boing Boing's in-flight TV channel on Virgin America airlines (#10 on the dial), and writes about living with breast cancer. Diagnosed in 2011. @xeni on Twitter. email: firstname.lastname@example.org.