Flash is able to export frames to gif/png sequences, which is handy for when you're using it for character animations. It could also export an entire movie to an image sequence, for conversion to a FLC cutscene. For non 256 colour games, AVI export is the best option for an intro or cutscene in most cases.
It would be possible to incorporate one of the open source flash players into a plugin, to provide some limited swf playing ability, but not worth doing in my opinion.