Let me offer more background:

1. To my knowledge, we are not linked to any bad sites.
2. Multiple copies of our homepage (i.e. /index, /home, etc...) have been addressed. Recognized pages (pages that rank well and have PR) have been perm redirect and those that weren't received a meta-robots 'none.' Could this be a reason?
3. The only recent optimizations have been to meta tags, primarily on interior pages.


If I could, I'd post the links so you could see what I'm talking about. It's a very odd situation and I've never heard of anything like this before, hence my reason for bugging you guys. To go from 'top 50' to 'not in top 100' is a painful drawback. Our SERP positions were slowly improving (site expansion, content additions, etc... all of which are very white hat) and suddenly, three pages (I believe recognized as blog pages) with our URL all over them, links to irrelevant sites, and a sex banner show up, and we get booted from top hundred on several G datacenters. I don't know how else to phrase it. Feel free to ask me for the URL's, but forum policy prevents me from posting them.

Thanks again, everyone!

Booker