Help with recent post shortcode

I am playing with the shortcode for the recent post plug-in.

Here is what I have so far: http://cohort21.com/post-from-around-the-cohort-21-network/

To get that I played around with the following code.
[globalrecentposts number="30" title_characters="60" content_characters="240" title_content_divider title_link="yes"  show_avatars="yes"  avatar_size="50"]

apparently there are more attributes that I can play with but I dont understand what they do.

'number' => 5,
'title_characters' => 250,
'content_characters' => 0,
'title_content_divider' => '',
'title_before' => '',
'title_after' => '',
'global_before' => '

    ',
    'global_after' => '

',
'before' => '

  • ',
    'after' => '
  • ',
    'title_link' => 'yes',
    'show_avatars' => 'no',
    'avatar_size' => 16,
    'posttype' => 'post'

    I want to make this page look cool.

    Can someone help me formate my short code so I can make this page a little more pleasant.
    some examples that I can cut and paste would be really helpful.