As you may know recently Google did a major update that seems isn’t finished yet.
It happened also on november 2004, and in both cases my site got severely penalized 🙁
It seems that got a hard hit on various search queries, but is slowly going up… like if they put all sites to “zero” and then they gained positions again depending on links number/quality.
Anyway the most fun thing is that the number of sales remain the same even with about 800 less visitors (daily)…!!