To quickly get started on Adboe Flex, and to get your dirty with some sample flex applications, go to below links

1. Adobe Flex SDK Opensource website

Adobe Flex SDK opensource website, where you can find all the documentation, SDK downloads of differenent versions, forums, and source code etc.

2. Adobe Flex Official Documetation

This link directly points to Flex documentation, this page has documentation for different Flex versions

Serendipity (ser-en-dip-i-ty or ser-uhn-DIP-uh-tee)

1. Good luck, Good fortune
2. Good luck in making fortune discoveries by accident.
3. Making fortune discoveries accidentally by a team of faculty or group.
4. An instance of or occurrence and development of discoveries or findings.