I have heard back, they didn't say anything, just that they had reviewed my site and gave me a link to the webmaster guidelines.
huh... there are a few other people on this forum who have mentioned extremely schizophrenic responses lately. something to the effect of: We have reviewed your site (note: PRESENT PAST tense). If we find anything wrong with it, we will contact you (note: FUTURE tense)
Maybe lots of people on the spam team at google are out on vacation right now?
(I am assuming the spam team handles manual reviews but I could be wrong.)