Dynamic content on a static front page

basically, you could add this static part to index.php before the loop.

or set a page as front page and make a page template for this page:
with two loops:
first: the ‘normal’ loop showing whatever you put into your page in the editor (5 – 10 lines of introduction);
second: query_posts() for the latest posts with whatever you want to show with the loop;

http://codex.wordpress.org/Pages#Page_Templates
http://codex.wordpress.org/Function_Reference/query_posts

framework, for instance:

<?php if (have_posts()) :
   while (have_posts()) :
      the_post();
      the_content(); //shows your lines of intro
   endwhile;
endif;

$paged = (get_query_var('paged')) ? get_query_var('paged') : 1; query_posts('posts_per_page=10&cat=0$paged='.$paged);

if (have_posts()) :
   while (have_posts()) :
      the_post();
      the_title(); //shows the recent posts and snippets
      the_excerpt();
   endwhile;
endif;