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Is there a way to get google to spider all my sites without actually having to submit them? That was one of my intentions in creating a page that lists each of my sites....My thought was that I could add each new site to my links/hub page and Google would spider them automatically.
This sort of thing is what makes me have serious worries about how Google does things. What kira is proposing here is the sort of thing I'd exect webmasters *naturally* to do! By "natural" I mean that which webmasters would tend to do even if they weren't considering search engines. Putting up a page listing all your sites and linking to it would be the sort of self-promotion I'd expect webmasters to engage in. I can see the logic in Google penalizing people who artificially set up sites *just* for the purpose of ranking well in Google. However, penalizing the natural tendency for webmasters to tell people about their other websites?
On the other hand, I wouldn't expect the outlying sites to have a significant PageRank either. It wouldn't be a penalty, simply that a link from a page with multiple links wouldn't bring much PageRank. Unless you were to develop other links for each of those sites, I wouldn't be surprised at all for them to have a PageRank of 2 or less (zero, perhaps). But that's not a penalty; it'd be the PR value they'd "deserve."
If you develop other links to those sites, and to the hub site, I wouldn't expect any problems at all. Because "natural" linking, as rfgdxm1 mentions, involves links to and from various sites and pages. If your sites only link among themselves, that isn't "natural," it's a "closed circle." And that can equate to "bad neighborhood."