Nothing to see here (yet). You might want to check out the source or get it from hackage.
Hint: git clone http://rebworks.net/git/follower.git
Usage:
reb@terra:~$ follower --help
follower 0.0.1 Copyright R. Emre Başar 2011 - ...
follower [OPTIONS]
Common flags:
-f --follow=SCREEN_NAME Follow the user with the given screen name
-n --no-follow=SCREEN_NAME Stop following the user with the given screen
name
-l --list Display the current follow list
-? --help Display help message
-V --version Print version information
reb@terra:~$