I've got an Exact Match Domain that has just started to do well in Google for say the past year. I've always received good rankings from Bing and Yahoo but I love the traffic levels that Google sends.
Long story short on the 25th according to webmaster tools, my impressions on their search engine have been destroyed. No problems, not de-indexed, just not showing my site anymore.
I like this site and have been careful, built some links and the anchor text is suspect but also not suspect because its the same as the domain. What I feel the problem may be is the site structure. I set it up a long time ago like this:
Exact-Match-keyword. com/ Exact-match-keyword.php/state
I thought it looked kinda spammy at the time but also thought it may help. Now I'm wondering if I shorten all the page titles to the state name and 301 the old links if I will regain rankings, or if I may lose some from other search engines.
I used to think Penguins were cute......