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You could wait for a few days to see if it comes back. And make sure that your website is up and running at all times. If you are indexed by other search engines, chances are that Google will include your site pretty soon.
I've been hit with penalties before, including the evil 950, but the PR remained the same. When Google hit a mini network, too, the PR of the sites remained the same.
If your sites are interlinked, it's usually a good idea to remove the links, add rich content, remove footers, and generally make everything Google friendly.
Google has been upping the ante on network detection and punishment in the last six months.
But I do not interlink between them, and not site-wide link
site a - link to main site (not link back)
site b - link to main site (not link back)
site c - link to main site (not link back)
site d - link to main site (not link back)
site e - link to main site (not link back)
site f - link to main site (not link back)
Tester and all, how about your opinion on that, will it be a problem?
In recent past, to be banned rather than just penalized, it had to be pretty clear on a manual inspection that the sites in a "feeder network" existed only or mostly to boost PR and rankings for the main site.
I think getting a total ban is a question of quality, and that can include a human judgement call. Quality can be decided by a "verdict" from Google's team of human reviewers once the sites involved get flagged by the algorithm.