Adrian Panasiuk has been steadily making progress on the Flash Bounty. He has the Mozilla plugin working with BeZilla, and I was able to play a YouTube video, as well as play a flash file on one of my websites (the header).  Although the gnash player needs gcc4, the plugin itself can be built for BeZilla-gcc2.

*Note, Adrian is currently looking for testers and feedback... The package containing the binaries can be downloaded:

Here, with usage and installation instructions here.

See the screenshots.