Anyway, I've been using Orkut for sometime now and I can tell more about it. Unfortunately, the servers where Orkut resides are very very unstable. I get something like below message every other time I click on something:
|Bad, bad server. No donut for you|
Ahhh! If it works though, it is a vast network with really cool features like 'communities'... There are tons of communities that you can join. These are basically forums where you can read/post messages and it is a good way to meet new people. Clicking the name of a poster will take you to their profile page and you see their friends and communities as well as personal information and pictures they may be sharing. On the other hand, unlike Microsoft's Wallop & Yahoo's 360 there is no blog feature
When you add someone as a friend, you are actually giving the person ability to see more about you and if (s)he does the same then you become connected-friends. You may write a testimonial about your friend.
There in the forums, I've read that server instability has always been an issue and there has not any improvements, so people are even speculating that Google may drop Orkut service all-together. Now that Yahoo & Microsoft are in the game, I don't think that will happen soon.