http://cloudcontrol.com/
Scalable PHP PaaS service. Based on the concept of "boxes", which handle 2 simultaneous requests each, and can scale up and down dynamically. So 12 concurrent requests equals 6 boxes. Strange, but potentially cost effective for traffic peaks.
http://orchestra.io/
PHP PaaS provider based in Ireland, acquired by Engine Yard.
https://phpfog.com/
PHP cloud hosting. Very slick architecture. Custom managed EC2 nodes deployed behind varnish caches and nginx load balancers. Fairly reasonably priced.
http://www.heroku.com/
Ruby, Node.js and Clojure application hosting. Pricing is based on web and background workers. One node free.
http://www.pyrosoft.co.uk/blog/2010/10/27/import-your-own-rsa-ssh-key-into-amazon-ec2/
How to get custom RSA SSH keypairs into EC2. There is one region missing from this post.
http://uec-images.ubuntu.com/releases/
Handy list of the ami codes to launch an ubuntu server instance on amazon's EC2.
http://www.s3rsync.com/
Rsync to S3 is a service which combines EC2 and S3 to provide a bandwidth efficient S3 based backup mechanism. It takes advantage of the free bandwidth between EC2 and S3 to overcome the limitations of S3 for rsync backup.
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.
