You can download my fully functional Follow plugin from http://wordpress.org/extend/plugins/follow/
This plugin comes with an inbuilt subscription manager also and will add a follow button to the right bottom corner of your blog.
REMEMBER TO SEE INSTALLATION OPTIONS BEFORE INSATLLING
For clarifications or problems feel free to contact me at my website hppt://adityajain.name
I have updated the Follow Plugin to Version 10.0.2 which removes 9 bugs and solves the fatal error problem
Please update accordingly
Feedbacks and Rating are again invited
Feel free to contact me if you face any problem