The info above is really irrelevant.
What you need to read is this...
http://www.webmasterworld.com/forum30/33893.htm
and this...
http://www.webmasterworld.com/forum30/34055.htm
Basically, Google has changed EVERYTHING when it comes to how it spiders and indexes your site. So far, not too many people are happy.
I can tell you that I had 200,000+ pages in the index and now I have 180.
Luckily, I am still on page one when searching my main keyword. I have not seen a traffic decline at all believe it or not.
There are rumors of some of the pages coming back but, I'd keep an eye and ear out.
Miguel