Google Deindex due to Duplicate? From what i heard and what i see, google seem to de-index or lower indexing rate if your site is having content other might have.. I fear my web2.0 site might face this problem as my content is from video network and they are use by many site.
I have similar video sites that range from an couple years old to an few months. All of them except the 3 month site is ranking #1 for my main keywords, with many, many pages indexed. So far I haven't seen any sign for dup video content being an huge issue. Guess it depends on how well it is SEF to I suppose.
One of my site was recently deindex and I believe it is because of duplicate content. I was using too much rss feeds as content news. I have to change my proportion of unique content versus duplicate content.
Duplicated content issues are very critical and should be treated carefully as it might gets your whole website deindexed. Do you mind sharing your Web 2.0 website URL so we might take a look, and properly help you out