Quoting "Metzler, David" metzlerd@evergreen.edu:
The number length of trimmed posts is site wide and found by visiting Administer Post settings (under Content Management header). You cannot change this per content type.
Whether the blog appears on the front page is found in the Administer Content-types page (Under Content Management).
What you can do is download the views module and make a custom teaser view. This would let you control the maximum number of posts independently for that view which would filter only on that content type. That's done in administer views. IT may be that you have views installed already, I can't tell from this post.
Or write a custom module that uses the hook_node_type API[1].
[1] http://api.drupal.org/api/function/hook_node_type
Earnie -- http://for-my-kids.com/ -- http://give-me-an-offer.com/