My much loved Belkin keyboard croaked it yesterday (or at least several of the keys now refuse to work). Today I bought an Advent ADE-KBW100, largely because it is slimline, quiet to type on, and didn’t break the bank. It claims to only be compatible with various versions of Windows, but not only does it work perfectly with Ubuntu, I can also use all 18 of the hotkeys without any further installation of drivers (which actually makes it more compatible with Ubuntu than with Windows XP).
Once again, another win for Ubuntu.