Webair can not meet the minimum requirements to run Magento on their virtuals. Here are the requirements:
http://www.magentocommerce.com/system-requirements.
I'm not sure if I want a virtual just for this test with Magento or if I want to leave Webair entirely but I'm looking to at least be able to install Magento by the end of the day so spam your hosting company of choice if they can run it.