I guess it's possible from this link: http://www.intertwingly.net/blog/1299.html. Sounds like glibberish to me, but they seem to succeed in it. Something about . I don't get it.
Update:
The W3C says:
An item may also be complete in
itself, if so, the description
contains the text (entity-encoded HTML
is allowed),
And this works for me:
<?xml version="1.0"?>
<rss version="2.0">
<channel>
<title>Liftoff News</title>
<link>http://liftoff.msfc.nasa.gov/</link>
<description>Liftoff to Space Exploration.</description>
<language>en-us</language>
<pubDate>Tue, 10 Jun 2003 04:00:00 GMT</pubDate>
<lastBuildDate>Tue, 10 Jun 2003 09:41:01 GMT</lastBuildDate>
<docs>http://blogs.law.harvard.edu/tech/rss</docs>
<generator>Weblog Editor 2.0</generator>
<managingEditor>[email protected]</managingEditor>
<webMaster>[email protected]</webMaster>
<item>
<description>Sky watchers in <strong><big>Europe</big></strong>, Asia, and parts of Alaska and Canada will experience a <a href="http://science.nasa.gov/headlines/y2003/30may_solareclipse.htm"&gt;partial eclipse of the Sun</a> on Saturday, May 31st.</description>
<pubDate>Fri, 30 May 2003 11:06:42 GMT</pubDate>
<guid>http://liftoff.msfc.nasa.gov/2003/05/30.html#item572</guid>
</item>
</channel>
</rss>
Note the strong and big elements in the description. It's displayed properly in Safari.