I'm not sure about that keyboard, but just as another possible buy for you, yesterday I bought a new Trust Multimedia keyboard from Robert Dyas http://www.robertdyas.co.uk/P~148275~Tr ... a+Keyboard
and all the buttons at the top work in my Ubuntu 10.04.
By every button I mean every one of them. It is a simple cable attached multimedia USB/PS2 item and everything is working. All the preset buttons along the top, for default Media-player (startup and control of play of rhythmbox), Email, Web browser, volume up/down/mute, Suspend, Power-off, calculator, home folder, back and forward in the web-browser and file manager.
Great buy at £5.99, and quite a nice feel to it in comparison to my old cranky, creaky and very rattly keyboard.