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Anyhow my solution was to put a 307 redirect on all of these sites to a page explaining that the sites were taken down pending a redesign that would not take over the google results the way that I did.
The rankings survived the Austin update, but two days ago, all of the pages disappeared from the rankings. One day ago, I removed the redirect having updated all of the pages to remove the reference to my search term.
I'm not sure if google decided that the 307 temporary redirect was taking too long to fix and therefore removed the pages from the index, that it removed them from the index for the fact that they all ended up in the same place, or if someone filled out a spam report.
Whatever happened, I'm happy, and my rankings don't seem to have been otherwise adversely affected. (although for my most desirable terms they've been non-existant since austin).
I'm not certain that there is anything to be learned from this, but I thought I'd share my experience for those that were interested.