Here’s how to get flash working on Chrome under Debian:

su -
cd /opt/google/chrome
wget http://download.macromedia.com/pub/labs/flashplayer10/flashplayer10_1_p3_linux_022310.tar.gz
tar xvzf flashplayer10_1_p3_linux_022310.tar.gz
mkdir plugins
mv libflashplayer.so plugins/
rm flashplayer10_1_p3_linux_022310.tar.gz

Then just restart Chrome :)