soccer_star - 12:45 am on Apr 28, 2004 (gmt 0)

Tapanti

Are all or most of these 80 sites on the same IP address, as this could've triggered the filter you mention.

If so I'd make sure your new mega-site is on a completely different IP address to be safe, and like Big Dave said, don't link to any of the 80 sites from your new meag-site.

In fact I'd even steer clear of linking to the mega-site from any of the old sites just in case Google is somehow utilizing whois information to penalise excessive linking between sites owned by the same person/company. Whilst there is no evidence to support such a theory, it is nevertheless a conspiracy theory doing the rounds and if you want to be ultra safe I wouldn't risk it.