bit-tech.net took a look at gaming on the Linux platform earlier this month:
A lot of current or semi-current games either just work, or work with minimum effort, on Linux. While it is true that some distros (like Gentoo, for instance) require some work to get up and running, this isn’t a general rule. Ubuntu installs are arguably easier than Windows, and the fancy Vista Aero eye candy works with Beryl or Compiz on a low spec machine. So, why not give it a chance?