I like this idea.  It would also make it easier to see past who's hiring threads as well.  Just go to:
<a href="http://news.ycombinator.com/user?id=whoishiring" >http://news.ycombinator.com/user?id=whoishiring</a>
and look at the submissions.  Beats crawling through results on searchyc.com.
Ask HN: Should we agree that this account will submit all Who is Hiring posts?