whoops, link for the Perian Quicktime plugin i posted above doesn't work (incorporates the bracket into the link address for some reason). try this link instead. I should mention that it is a Mac-only plugin, but that might be obvious.

Advice, anyone, on stand-alone FLV players?

there is this plugin (http://perian.org/) for quicktime that allows it to play FLV clips. not stand-alone i guess, but it works fine.