Something occurred the other day that people might find interesting, sorry about the long story. I recently set-up a small network of 35 sites with rss feeds, a total of about 400 sub-domains, linked together. All domains recently expired. They all started to get a few pages in G, some up to 300, then suddenly all dropped to 0 Sh... (at the same time I set-up a few more groups of sites that are currently doing well in G, with a few hundred pages each in the index) I didn't do any sort of promotion except a ping to each site and sub-domain once. Nothing blackhat about any of the content. I think my mistake was not checking the domain history carefully enough, I now think that 2 or 3 of the domains had previously been used as part of a link farm, perhaps with paid links. (I didn't check before because when I registered them google was showing a few pages indexed for each domain, so they weren't banned....) Anyway, I tried pinging the sites again, no response from G, However every day G takes a page or two pages from the two domains that I think may have been link farms. So, the domains may have been banned for linking to a 'bad neighbourhood', or they may have been banned because they have links from a link farm. The REALLY interesting thing is that G is ignoring all the domains except the Bad ones. They haven't re-indexed these domains yet so I think they are spidering these pages looking for other sites to BAN!. I may set-up an experiment to see if the link-in or link-out was the problem.. but I am busy so... BTW one of the 'bad' domains has 14,000 pages in Y, the other has 10,000 Not a big deal, you win some and loose some, but I thought I'd share this as there may be a lesson in it for others as well as myself.