Check out GlassDoor.com - they are actively trying to fix problem of lack of data about compensation. People post actual salary data as well as detailed company reviews.
Note that they do require a free registration after your first few searches. The registration requires you to enter a salary or company review, which is a pretty fair trade.
Note that they do require a free registration after your first few searches. The registration requires you to enter a salary or company review, which is a pretty fair trade.