If you are in office or school or univeristy campus where orkut is blocked,either by the office administrator or by your organization then you can access it easily without any hassles.This can also be tried by users living in countries where orkut is blocked by their ISP. There are 2 sites that can help:
1.Just go to www.mathtunnel.comand type in the name of any site you want to access.This works for orkut and other blocked sites too.
2.There is one more site www.gravitywars.com.This is very good as it is updated regularly.
Even though the blocked sites can be accessed through proxy servers as i have discussed in my earlier post,but i have noticed that the sites for proxy servers is blocked at various places.