IPV6
Nice little tip from the VS.NET 1.1 (final) installer.
"To enable IPv6 for a particular client or Web application, you must make the following changes to your Application configuration file (app.config) or your Web configuration file (web.config):
<configuration>
<system.net>
<settings>
<!-- The following entry enables IPv6 support in the System.Net classes. IPv6 support is predicated on availability of an IPv6 WinSock provider. -->
<ipv6 enabled="true" />
</settings>
</system.net>
</configuration>"