BitNami Studio alllows you to the create your own virtual machines and cloud images from $50/month.
Pick and choose from an extensive library of software components and operating systems or add your own. A REST-based API and command line tools allow you to create, start and stop images on demand, allowing integration with nightly-build build processes and source control systems.
BitNami now provide both VMs based on both OpenSuse and Ubuntu so you now choose between BitNami and JumpBox for your pre-built Ubuntu software appliances and VMs !
BitNami pre-built VM software appliances
JumBox pre-built VM software appliances
GoGrid is offering a $100 service credit to BitNami users that will give you hundreds of hours of free cloud computing time to test out GoGrid and make sure it meets your need