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Add More Than 1000 Friend's
This trick is invented directly by orkut.They just created a Invite a Friend on the home page through that you can add more than 100 friend's. 1.Now: Navigate to - http://www.orkut.com/Invite.aspx.
2.Now Enter Email Addresses to add as your friend(s) - Make sure the members are active on orkut.
3.Enter the captcha.
4.Submit
5.Now: You will see option to add the profiles as your friend just select all the check boxes and all the profiles will be sent request automatically.
Getting Invisible Name on Orkut - 2
Requirements:
You should have a account in Yahoo! mail.

Just follow he steps to create a account with no name:
Go to www.blogspot.com
Register your Yahoo! id there.
After registering , on the URL bar , just type www.orkut.com (without closing blogspot)
As a result, Orkut will ask you for password ( as Orkut and blogspot are affiliated )
Just enter the password which you registered in Blogspot
Now, Loading will start and Orkut will ask you for accepting Terms and Conditions. Accept them
Now Orkut will ask you for completing your profile, without doing anything, just type www.orkut.com on URL bar.
As a result, a account with no name will be created!