Hi everyone, I saw the discussions regarding SDK inclusion process. In my case, it's true that I cannot improve any component without having requests for that. The submitted components reflects exactly what I needed them to do at the time they were created.
In Alert's case, it's written in the same manner as old MX component was written. Other components might lack same set of properties or behavior like the old ones, but this is because I wanted to allow more flexibility in the usage - or due to Spark skins, there is no need to write that functionality. Besides existing components, ProgressBar component was added to GitHub<https://github.com/badu/SparkComponents>. All components have usage example (and a few words describing them) in the readme.txt of the repository. Looking forward for feedback / feature requests and bugs to fix. Best regards, Bogdan DINU