I've just release the first alpha of my standalone player for browser plugins on linux, CrutziPlayer.
The player uses the NPAPI compatible browser plugin, but provides an universal fullscreen mode via XComposite, Cairo and XFixes. For know, only relative pointer devices (e.g. mouse) will work correctly, touchscreens could create jumping pointers.
It's far from being finished, but already runs e.g. the majority of flash based browser games.
crutziplayer -f http://amanita-design.net/samorost-1/main.swf