Modified version of Shutter Reloaded plugin for WordPress. I’ve added SWF (flash) file support. Tested only under Mac OS X with Firefox and Opera browsers.

All you have to do is add a name parameter with desired resolution to your anchor, eg:
<a name="320x240" ...

Download: shutter-reloaded-swf.zip

Author’s page: http://www.laptoptips.ca/projects/wp-shutter-reloaded/

Remember, that the page needs to load completely before Shutter Reloaded can work