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I can't give any advice on this - due to the lack of experience- but i'd take a flip chart and draw all linkings between the sites using different colours. Then i'd carefully look how the links flow - are there any circles? Bad! Does it look artificial? Bad! It should "look" natural and even should stand a manual check of the networked sites. It's not the number of links but how the sites / pages are connected. I'd avoid patterns.
However, i have no experience so i'm just guessing ... and i wouldn't suggest building a 100 x 100 network if all the sites share the same topic etc.
Btw: why did you post at the cloaking forum?