use vars better, and put a previous post link at the bottom...

layout/frontpage.j2

@@ -5,11 +5,27 @@
 {% block page_title %}<h1 class="title">{{ resource.meta.title }}</h1>{% endblock %}
 -->
 
-{% for res in resource.node.walk_resources_sorted_by_time()[0:3] %}
+{% set posts = resource.node.walk_resources_sorted_by_time() %}
+{% for res in posts[0:3] %}
 
 {% refer to res.relative_path as post %}
 {{ post.post }}
 
 {% endfor %}
 
+<section>
+
+{% set nextpost = posts[3] %}
+<p class='prevnext'>
+<span class="small">
+<a class="prev{{' disabled' if not nextpost }}"
+    title="{{ nextpost.meta.title }}"
+    {% if nextpost %}
+    href="{{ content_url(nextpost.url) }}"{% endif %}>
+    Previous Post
+</a>
+</span>
+</div>
+</section>
+
 {% endblock %}