Adobe and salesforce.com
Adobe and salesfoce.com today announced the availability of the Flex toolkit for Apex. You can read the details here, and download the toolkit here!
Apparently - "Using the new Flex Toolkit for Apex, developers can create richer application experiences for their salesforce.com deployments and Apex applications. Developers can also make their Flex-based applications available on the AppExchange directory, and deploy them on-demand and with no additional software required."