I'm a bit of a beginner navigating xml, but I think I need an xpath, and using selectnodes, something like as follows:
objItem.selectNodes("/feed/entry/media:group/media:description") - but I know that's not quite right.

Can anyone give me a pointer as to how to access the description?

I'm posting the xml as it comes through below:

<?xml version='1.0' encoding='UTF-8'?>
<feed xmlns='http://www.example.com/2005/Atom'
xmlnspenSearch='http://example.com/-/spec/opensearchrss/1.0/'
xmlns:gml='http://www.example.com/gml'
xmlns:georss='http://www.example.com/georss'
xmlns:media='http://search.example.com/mrss/'
xmlns:yt='http://gdata.example.com/schemas/2007'
xmlns:gd='http://schemas.example.com/g/2005'>
<id>http://gdata.example.com/feeds/api/standardfeeds/top_rated</id>
<updated>2008-02-21T18:57:10.801Z</updated>
<category scheme='http://schemas.example.com/g/2005#kind'
term='http://gdata.example.com/schemas/2007#video'/>
<title type='text'>Top Rated</title>
<logo>http://www.example.com/img/pic_youtubelogo_123x63.gif</logo>
<link rel='alternate' type='text/html'
href='http://www.example.com/browser?s=tr'/>
<link rel='http://schemas.example.com/g/2005#feed' type='application/atom+xml'
href='http://gdata.example.com/feeds/api/standardfeeds/top_rated'/>
<link rel='self' type='application/atom+xml'
href='http://gdata.example.com/feeds/api/standardfeeds/top_rated?...'/>
<link rel='self' type='application/atom+xml'
href='http://gdata.example.com/feeds/api/standardfeeds/top_rated?...'/>
<author>
<name>YouTube</name>
<uri>http://www.example.com/</uri>
</author>
<generator version='beta'
uri='http://gdata.example.com/'>YouTube data API</generator>
<openSearch:totalResults>99</openSearch:totalResults>
<openSearch:startIndex>1</openSearch:startIndex>
<openSearch:itemsPerPage>25</openSearch:itemsPerPage>
<entry>
<id>http://gdata.example.com/feeds/api/videos/ZTUVgYoeN_b</id>
<published>2007-02-16T20:22:57.000Z</published>
<updated>2007-02-16T20:22:57.000Z</updated>
<category scheme="http://schemas.example.com/g/2005#kind"
term="http://gdata.example.com/schemas/2007#video"/>
<category scheme="http://gdata.example.com/schemas/2007/keywords.cat"
term="Steventon"/>
<category scheme="http://gdata.example.com/schemas/2007/keywords.cat"
term="walk"/>
<category scheme="http://gdata.example.com/schemas/2007/keywords.cat"
term="Darcy"/>
<category scheme="http://gdata.example.com/schemas/2007/categories.cat"
term="Entertainment" label="Entertainment"/>
<title type="text">My walk with Mr. Darcy</title>
<content type="html"><div ... html content trimmed ...></content>
<link rel="self" type="application/atom+xml"
href="http://gdata.example.com/feeds/api/videos/ZTUVgYoeN_b"/>
<link rel="alternate" type="text/html"
href="http://www.example.com/watch?v=ZTUVgYoeN_b"/>
<link rel="http://gdata.example.com/schemas/2007#video.responses"
type="application/atom+xml"
href="http://gdata.example.com/feeds/api/videos/ZTUVgYoeN_b/responses"/>
<link rel="http://gdata.example.com/schemas/2007#video.ratings"
type="application/atom+xml"
href="http://gdata.example.com/feeds/api/videos/ZTUVgYoeN_b/ratings"/>
<link rel="http://gdata.example.com/schemas/2007#video.complaints"
type="application/atom+xml"
href="http://gdata.example.com/feeds/api/videos/ZTUVgYoeN_b/complaints"/>
<link rel="http://gdata.example.com/schemas/2007#video.related"
type="application/atom+xml"
href="http://gdata.example.com/feeds/api/videos/ZTUVgYoeN_b/related"/>

<author>
<name>Andy Samplo</name>
<uri>http://gdata.example.com/feeds/api/users/andyland74</uri>
</author>

<media:group>

<media:title type="plain">Shopping for Coats</media:title>
<media:description type="plain">
What could make for more exciting video?
</media:description>
<media:keywords>Shopping, parkas</media:keywords>
<yt:duration seconds="79"/>
<media:category label="People"
scheme="http://gdata.example.com/schemas/2007/categories.cat">People
</media:category>
<media:content
url='http://www.example.com/v/ZTUVgYoeN_b'
type='application/x-shockwave-flash' medium='video'
isDefault='true' expression="full" duration='215' yt:format="5"/>
<media:content
url='rtsp://rtsp2.example.com/ChoLENy73bIAEQ1k30OPEgGDA==/0/0/0/video.3gp'
type='video/3gpp' medium='video'
expression="full" duration='215' yt:format="1"/>
<media:content
url='rtsp://rtsp2.example.com/ChoLENy73bIAEQ1k30OPEgGDA==/0/0/0/video.3gp'
type='video/3gpp' medium='video'
expression="full" duration='215' yt:format="6"/>
<media:player url="http://www.example.com/watch?v=ZTUVgYoeN_b"/>
<media:thumbnail url="http://img.example.com/vi/ZTUVgYoeN_b/2.jpg"
height="97" width="130" time="00:00:03.500"/>
<media:thumbnail url="http://img.example.com/vi/ZTUVgYoeN_b/1.jpg"
height="97" width="130" time="00:00:01.750"/>
<media:thumbnail url="http://img.example.com/vi/ZTUVgYoeN_b/3.jpg"
height="97" width="130" time="00:00:05.250"/>
<media:thumbnail url="http://img.example.com/vi/ZTUVgYoeN_b/0.jpg"
height="240" width="320" time="00:00:03.500"/>
</media:group>

<yt:statistics viewCount="93"/>
<gd:rating min='1' max='5' numRaters='435' average='4.94'/>

<gd:comments>
<gd:feedLink
href="http://gdata.example.com/feeds/api/videos/ZTUVgYoeN_b/comments"
countHint='2197'/>
</gd:comments>

</entry>

[edited by: httpwebwitch at 4:46 pm (utc) on Sep. 11, 2008]
[edit reason] "examplified" all the URLs [/edit]