I’m greatly delayed in writing about this, but Google underwent a huge search engine change. I want to say the switch over occured around February 1st or second. I had been seeing 1000 or so visits a day prior to the change (well to be fair 600-1200 a day…) and after the change now see 60-120 visits a day. Yes, the change was that big. eweek tells us some about it. All in all many say that this is improving search results. (I suspect I’d think so as well if my pages were MORE prominent after the update…)