http://reductivelabs.com/trac/puppet
Puppet is a system to abstract system administrator tasks such as configuring web servers, deploying database servers, and so on. It provides an abstract language to specify configurations and then handles deployment for you.
http://www.3tera.com/
3tera provide a grid platform to deploy "virtual appliances" on a "virtual datacentre" built on top of commodity hardware, similar to Amazon's EC2/S3.
http://highscalability.com/
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.
