We have just released BitNami Stack for Piwik (Piwik Cloud Hosting, Piwik Installer, Docker Container and VM). It is an easy one-click installer for Windows, OS X and Linux. They are self-contained and independent so you can install it without modify your system. You can also install more than one for testing or share the servers with other applications easily: wordpress, drupal, etc.
You can also download a Virtual Appliance ready-to-run or you can deploy it for free in the Amazon Cloud during one year thanks to Amazon AWS Free Tier (Capa gratuita de AWS)
They ships Piwik 1.5.1 and dependencies: PHP 5.2.8, Apache 2.2.19, MySQL 5.1.56.
Any feedback will be highly appreciated.