Have you heard about Buzzsaw? It is actually a shortcut on Feedage.com for the top 15 search terms as listed by
Long before Google's hot trends, Yahoo! Buzz was the cynosure of avid news readers and passionate bloggers (you may count me in). There is so much to read and digest in Tahoo! Buzz that it is not enought to write a single blog post covering all that interests you.
There are two top 15 lists in Buzzaw. One is called the 'Leaders' and the other is called the 'Movers'.
Check it out: http://www.feedage.com/buzzsaw.php
You can catch quite a few movers if you don't like the leaders.