Google (XML) Sitemaps Generator plugin generates a XML-Sitemap compliant sitemap of your WordPress blog. This format is supported by Ask.com, Google, YAHOO and MSN Search.
What Others Are Saying allows you to display the most recent post of your favorite blogs somewhere on your site. It utilizes the RSS link field from the blog roll for each of your links. If the RSS link exists it attempts to get the last post from it. It then displays the most recent X number of posts depending on your settings. Each blog can have one post in the list.