I like to check out sitepoint everyday to see what is happening in the market. I also like to find my niches there. What could be a better place to find ripe markets that going to sitepoint reading their pitch and looking at their traffic and keywords?

Cut to the point there was an e-commerce store for sale and they were talking about all the efforts they took to optimize the site for SEO. One thing caught my eye, in addtion to the hubpages, squidoo pages, and the blog they had built they claimed to have 4 other sites (that they didn’t identify (URL) ) that they set up of different IP address.

Does anyone know about this practice?
How do you get different IP addresess?
What is and IP address?
Is this white hat?
Does it work?

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