What happened?!?!?

Recently, my company was moving up in rankings on SERPs. No solid PR change yet, but we’re waiting for Jan. At any rate, I’m doing a check of datacenter ranks and I see ‘not in top 100’ in the results, sporadically. We’ve been in top 100 for some time now with relevant info and such growing almost daily for the term ‘chicago real estate’. I checked toolbarqueries and two other pages come up in the SERP. It seems that we’ve also dropped on MSN. Please check out the following link and share with me any ideas you may have. It doesn't 'feel' good to me, but I'd like some unbiased opinion and possible resolution ideas.

http://toolbarqueries.google.com/se...G=Google+Search


Thanks,
Booker