We have had a few people ask about the no index no follow tags appearing on some blogger blogs, there is a lot of discussion going on about it now so it should be pretty easy to find info about but here are the basics as I understand:
Blogger was/is generating code on some blogs that cause the search engines not to follow them…. so you might want to check yours out and see if yours is one of them.

It sounds like this may be more of an issue for people converting over to the new blogger, and it should be an easy fix if you are aware of it.
Here is an article that talks about it, if anyone has any more info feel free to comment.
Thanks

T