<p>My personal favorite: <a href="http://www.google.com/coop/">Google Co-op</a>. Among other things, it gives you the ability to become Google — that is, to set up customized search results that your colleagues can then subscribe to. Say you're a biologist with a database of species information. You can set up a Co-op trigger where the keywords are species names, and tell your colleagues to subscribe to it. Then when one of them does a regular Google search where the search string includes a particular species name, your database's results for that species will come up in, say, a special one-box above or off to the side.</p>
<p>Now if only Google would decide whether it's "Coop" or "Co-op". The URL is <a href="http://www.google.com/coop/">http://www.google.com/coop/</a>, but on that page it's always referred to as "Co-op", with a hyphen. But if you go to the corresponding URL:</p>
<blockquote>
<a href="http://www.google.com/co-op/">http://www.google.com/co-op/</a>
</blockquote>
<p>...you get a 404 Not Found error: <em>"The requested URL /co-op/ was not found on this server." (At least, this is true as of today's date.)</em></p>
<p>Know anyone in a position to fix that? :-)</p>