yea man theyre do follow in blogger... if you download a program called seo quake, this has a feature to tell you if links are follow or not, puts a strike through through the ones which are no follow like... seo quake mate... tells u page rank, alexa rank, ip, whois everything your gonna need to kno... peace
It default as nofollow but some of the blogger change it to dofollow by remove the rel="nofollow' inside the html
I think by default Blogger is nofollow but you can change that. Then when you need to you can add the nofollow attribute. Try this link or do a search for 'remove nofollow blogger': http://webstractions.blogspot.com/2007/05/removing-nofollow-from-blogger-styled.html
no the blogs posting is not nofollow .........as if they are no follow the no one would be doing blogging to that particluar blog and will remove everusingle post by the blog...... thus in the world of websites you need to co-operate and work .....