You can configure the right logo of the banner including title and link on the image. You have to add some information in a pom (like a company pom) (coming from org.apache:apache in this example) :
<organization>
<name>The Apache Software Foundation</name>
<url>http://www.apache.org/</url>
</organization>
<properties>
<organization.logo>http://www.apache.org/images/asf_logo_wide.gif</organization.logo>
</properties>
From the menu, choose the 'Appearance' entry :

Use the 'Select a Company POM' link :

The result will be displayed (using org.apache:apache in this example) :

Note : the pom is searched in central repository and the repositories available for the active profiles from your $user.home/.m2/settings.xml
You can configure the footer by putting your own html content in the 'Appearance' entry of the menu.

The default value is :
<div class="xright">Copyright © 2005-${currentYear} The Apache Software Foundation</div> <div class="clear"><hr/></div>