woop, at last 
http://labs.adobe.com/downloads/flashplayer9.html
If the installer fails (as it apparently does for a lot of people) simply use the standalone archive and extract the libflashplayer.so and replace your existing (v7) one. Hey presto.
This means I can finally play Line Rider at home \o/

http://labs.adobe.com/downloads/flashplayer9.html
If the installer fails (as it apparently does for a lot of people) simply use the standalone archive and extract the libflashplayer.so and replace your existing (v7) one. Hey presto.
This means I can finally play Line Rider at home \o/