AlyssaS - 2:10 am on Oct 1, 2011 (gmt 0)
ACFinLA - would you say that the traffic you were getting up to now was transactional or informational? If you don't sell products but were getting transactional traffic, perhaps this is why you dropped? Maybe G expects product reviews to conclude with "here are three places you can buy this stuff".
There was an interesting thread a few days ago about a site that lost it's transactional (but not informational) traffic because G decided they were not relevant for commerce.