Orkut has feature to add your blog feed under your profile as menu. you can add more then one feed on your profile. By doing this, You will be able to promote your blog to thousands of members of orkut community. Your feed will be open to view by all of friends and other members who visited your profile. If the visitor of your profile will like feed content then you will get unique visits as well as additional subscriber. You can also ask your friends to add your feed on their profile to get extra visibility.