I just learned a new term via the women_dev mailing list (mostly populated by female games developers, although there are plenty fellas there too): TTP. "Time To Penis"!
Apparently it's oft used in the MMO dev scene, whereby the amount of flexibility in creation given to a user is directly proportional to the Time To Penis number. In Spore's case, apparently the TTP number can be measured in seconds, so much so that there's even a new term for the results: Sporn (link to YouTube, various videos there amusingly NSFW, like this one).
I wonder if this means online play will be limited to something like 15+?