Anything baring the mark 'Creative', and passing off the notion of 'working' is merely a testament to modern marketing and salesmanship. The X-Fi is the first piece of hardware ever made that sucks as badly on Windows as it does on Linux, but at least the ALSA crowd has the source code for it now and they can start fixing it themselves without getting sued into oblivion.
As such, stick with anything made by Auzentech, Razor, or Asus. They all make good cards and they're well supported by the common operating systems.