Looks like gnash works now at least for youtube stuff. (Still not for myspace.) Otherwise you can play flash flv files externally with vlc plugin.
# Machine: x86_64 # Kernel: Linux 2.6.22-rc5-amd64 (custom) # Debian GNU/Linux lenny/sid # Installed: libc6 2.6.1-1 gnash 0.8.0~cvs20070611.1016-1+b2 gnash-tools 0.8.0~cvs20070611.1016-1+b2 libgnash0 0.8.0~cvs20070611.1016-1+b2 mozilla-plugin-gnash 0.8.0~cvs20070611.1016-1+b2 mozilla-plugin-vlc 0.8.6.c-3 iceweasel 2.0.0.6-1 m°

