Developers using Amazon's EC2 API might find this interesting: Amazon has created an open source project on SourceForge for ElasticFox, their Firefox extension that lets you create and manage EC2 instances from a GUI in the browser. The utility lets you launch AMIs (Amazon Machine Instances) and then find, control, replicate and shutdown running instances. A handy right-click menu lets you quick launch more like ones already running. Having the source available will let developers extend this as needed. For more see the Amazon AWS blog and at our mashup profile here.