lfgoal - 1:34 pm on Mar 22, 2007 (gmt 0)

This is supposedly a statement made by Matt Cutts to someone on issues similar to this:

"Michael,Your gut seems right in that it's typically advantageous to have more content in fewer domains, assuming the content is closely related. With that said, though, I wouldn't worry too much about duplicate content penalties unless, indeed, the CONTENT is highly similar. Similarities in look, feel, and structure alone shouldn't be a problem."