It looks like Google has finally decided to support MSN Search's meta tag for not using Open Directory description in the search results for your site. MSN introduced the tag last May. Basically, by using the special meta tag, you're directing search engines that support the meta tag not to use ODP information for the page's description.

Here are the meta tags again:

<META NAME="ROBOTS" CONTENT="NOODP">
<META NAME="MSNBOT" CONTENT="NOODP">
<META NAME="GOOGLEBOT" CONTENT="NOODP">

The first tag tells all search engines that support the meta tag not to use ODP information. The second one is limted to just MSN Search and the last one limits it to Google.