Convert Flash to Screensaver with FlashSaverMaker
This post over at DownloadSquad discusses different ways to make your own Flash screensavers. On the Mac end of things, Victor points to FlashSaverMaker, which garners his "vote for Ugliest Site of the Year. But it works pretty well, and it's free, so why complain?" I agree. It's a cool little app. All you have to do is drag a swf file into the FlashSaverMaker, uncheck the configure box, and click on Build to make your own screensaver.
I took one of my old Flash animations and made it into a screensaver, which I released yesterday. You can download my screensaver from here, but don't be afraid to create your own.