Most of our 5800+ Mashups listed in our directory involve a new site being created from one or more other services, usually web sites themselves. The Kynetx API, which has been called Greasemonkey in the cloud, brings mashups into your browser, right where you're already browsing. The new version of its Chrome extension (coming soon to other browsers) gives users insight into what's creating the mashup they're viewing.
When the time comes to test how various implementations of different types of browsers actually work with a particular application, much trial and error still exist. Despite the rise of application testing services in the cloud, testing browser compatibility against a production application is still problematic. More often than not, when testing does occur, it’s against a replica of the application running in a different environment, being accessed by browsers that might not even have any of the plug-ins that the application may need to support in a production environment.