The other day I came across this cool site glassdoor.com. Here you can see the Review of companies by their own employees and also the salaries that they are paying to these employees at various positions. Its just like Eopinions for companies. But to see these you need to give your own salary and review of your company which they promise to keep as anonymous. A very simple but powerful concept.
So now I could see what my company’s competitors are paying to their employees.