Hi For all (probably I missed one or two components ;-).. if so then let me know or create the missing one in jira) spark components in experimental project I created a Jira Task.
Here's a direct link to all those components -> https://issues.apache.org/jira/issues/?jql=project%3D%22Apache%20Flex%22%20AND%20text%20~%20%22Spark%22%20AND%20component%20%3D%20%20%22Spark%20Components%22%20and%20labels%20%3D%20%22experimental%22. So flex people out there can now starting which components they would like to have in spark library. Cyrill