Unbalanced factorial designs

Hi everyone,
Thanks for the helpful feedback on this paper!

An updated version of the paper can be downloaded from
http://realpsychresearch.org/sites/default/files/InteractionsAndTypesOfSS.pdf.
The source file is at
http://realpsychresearch.org/sites/default/files/InteractionsAndTypesOfSS.Rnw.

Please feel free to use/modify/distribute it (I'm releasing it under a
creative commons license).

-Ista