Ohloh.com is a new kind of web site, it monitors open source projects, crawl their source code repositories and give you some interesting metrics.

Try JSPWiki (A Java based Wiki) and you will find interesting facts like:
Code Base: 65,670 LOC
Estimated Effort: 16 Person Years
It will cost you $879,389 if the average programmer salary is $55,000. You can change the average salary to your local market salary. I am sure you can save a lot by using open source tools.

Try it at: http://www.Ohloh.com