CLI theme alternative plugin superseded
PipperL’s alternative theme plugin is convenient when people want to try one of the most geekish WordPress theme, CLI theme, by Rod McFarland. Other than setting it as default theme (most people wouldn’t want that), or using ThemeSwitcher, PipperL’s plugin is the 3rd method — appending '/cli' to the end of site URL automatically changes to CLI theme.
Even though I don’t use PipperL’s plugin anymore (using ThemeSwitcher now), this might still be useful for others: somebody else extended it and gave it a new life: CLI switch. The original plugin no more works for CLI theme 2.0 or above.
Dennys also posts some instruction on how to update the plugin so it works for CLI 2.0 theme. However the instruction is hackish, and not feasible for Joe users.
2008-07-07 edit: I stopped using anything related to CLI plugin at least a whole year ago. It is a mess regarding CJK support… well, put it simply, there is no support. I have given up.