This site talks about how to build sites that are robust and will handle large loads of users/data.
In their own words
We started High Scalability to help you build successful scalable websites. This site tries to bring together all the lore, art, science, practice, and experience of building scalable websites into one place so you can learn how to build your system with confidence. Hopefully this site will move you further and faster along the learning curve of success.
It appears to be a useful site. I will spend more time on this and provide an update on how it is.