Affiliate Marketing Secrets

nOOB question:
I already have several submission campaigns going on with articles, press releases, squiddo, local, social boomarking, etc.. But now I want to create over 30 sites in the same niche and link back to main site. Can I do this on a shared account without getting penalized or ignored by google? These sites will be great quality with content from 5 star writers on textbroker. Still they are all sharing an IP.
Any suggestions? Reseller account or several mini accounts?