[Macpartners] Spyware removal tool for Macs?

[James C. White/MIT]

Folks,

   Can anyone recommend a product that will scan and
remove spyware or adware from a Mac?  I am also
curious about whether there are free downloads or
trial versions and whether they work for OS X or 9.x

   Spybot is the best tool I have found on Windows,
but they do not have a Mac product yet.

Thanks,
  James