First post on page with https://gist.github.com/nimbupani/1421828.

_includes/post_detail.html

@@ -0,0 +1,9 @@
+<h1 class="entry-title">
+{% if page.title %}
+    <a href="{{ root_url }}{{ page.url }}">{{ page.title }}</a>
+{% endif %}
+{% if post.title %}
+    <a href="{{ root_url }}{{ post.url }}">{{ post.title }}</a>
+{% endif %}
+</h1>
+<div class="entry-content">{{ content }}</div>

index.html

@@ -3,6 +3,12 @@ layout: default
 title: {{ site.name }}
 ---
 
+<div class="blog-index">  
+  {% assign post = site.posts.first %}
+  {% assign content = post.content %}
+  {% include post_detail.html %}
+</div>
+
 <div id="home">
   <h1>Blog Posts</h1>
   <ul class="posts">