A few weeks back my friend and I created HNTrends.com on a whim but since then, we've come to the realization that this has been done before (many, many times) so I thought I'd compile a compilation of the ones we found:<p>http://hntrends.jerodsanto.net/
http://touchwoodsoftware.com/yctrends.html
http://hn.metamx.com/
ours --> http://www.hntrends.com/