How to link to a single Usenet message

Usenet is a flowing river of information, with hundreds of thousands of messages posted daily, and sorted into tens of thousands of discussion areas in a sort of dotted hierarchy beginning with a general term (e.g., alt., comp., rec., soc., sci., and so forth) and then progressing into finer degrees of specificity, such as alt.religion.mormonism.fellowship.

Each message posted to Usenet contains a unique message ID, buried in the headers, like so:

Newsgroups: comp.editors
Subject: Re: need a Unicode compatible Editor for Perl
Date: 7 Nov 2005 10:26:43 -0800
Organization: http://groups.google.com
Lines: 41
Message-ID: <1131388003.052492.193900@g44g2000cwa.googlegroups.com>
References:
NNTP-Posting-Host: 66.185.252.134
Using Google groups, you can link directly to that message using the following URL technique:

For the message alone:
http://groups.google.com/groups?selm=messageID

For the message in its threaded context:
http://groups.google.com/groups?threadm=messageID

So, for example, you can click these:

Sample single message or this sample threaded message

Nice little shortcut, eh?