Buying Need wordpress custom byline on thesis theme

Below is the code for my current byline, it just displays the date. I want it to display the author too, in a format like this "by Author - March 23, 2012 " I also want the author to be a link to the authors profile and be nofollow.

function my_custom_byline() {

if(is_single()) {

?>

<p class="headline_meta"><abbr class="published"><?php the_time('M j, Y'); ?></abbr></p>

<?php 
}
}

add_action('thesis_hook_after_headline','my_custom_byline');

Code (markup):

 

i can do this.
pm me if the job is still available.

Thanks