Link popularity checker
http://www.marketleap.com/publinkpop/default.htm
It reports on both google and yahoo, also can give a report on where websites fall in your industry and what # of links they have. as well, you can enter in your commettion for comparision
The best thing about it is that you can see where everyone is in your industry and what the small guys all the way up to the gaints have as far as links.