Be careful. It is a doorway page identifier. Most modern doorway page generators (word scramblers) use an algo that is identifiable. If you are doing word scrambled doorways, make them dynamic/cloaked that prints some extra text to the page on each page load. I'd imagine something as simple as a ssi current time and date would suffice.
For other pages, AV will have to prove to me that they are any better at spotting dupes that Inktomi. Ink has the best dupe spotting routines anywhere - even if you just move words around, ink can spot it.
If you are doing other types of duplicate pages, make them with unique titles, metas, headings, footings, filenames, paths, and possibly rearrange the html. Spotting dupes is pretty difficult.
As they implement this 'dup technology' will they simply eliminate existing dups and keep just one page or will they ban the domain? If they are gonna ban the domain I could be in big trouble - I have a few dups floating out there from when I was a newbie to SEO and before I learned how to really do it.
I have created another "theme site" and would like to start submitting pages on Mon. Although my pages would appear different to engines on what you have mentioned above, I am still concerned. Brett would you mind having a look and giving me an appraisal (simple a -o.k or no go! would be cool). For obvious reasons, I have not posted the URL here.
Can I mail it to you. If this is against SEW policy, let me know.