<?xml version="1.0" encoding="utf-8"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
    <title>example</title>
    <link>http://example.com/</link>
    <description>Latest example.com torrents</description>
    <language>en-us</language>
    <atom:link href="http://example.com/rss.xml" rel="self" type="application/rss+xml" />
    <item>
	<title>Torrent title</title>
	<guid isPermaLink='true'>http://example.com/123456.html</guid>
	<pubDate>Sun, 21 Oct 2012 22:56:14 +0200</pubDate>
	<category>Software</category>
	<link>http://example.com/123456.html</link>
	<enclosure url="" length="" type="application/x-bittorrent" />
	<description><![CDATA[]]></description>
    </item>
  </channel>
</rss>

В enclosure в атрибут url добавляем magnet, в length — размер содержимого торрента в байтах. На локалхосте заработало, utorernt 3.2, win7