I would suggest keeping the site on a separate IP from the other websites that LINK to it. I think this time around they (G) turned up the value of the filter that reduces the impact of interlinking websites hosted under the same IP. (hit me hard)
What gets hit: - sites on the same IP linking to each other - site on a UNIQUE IP that is linked ONLY from sites with the same IP
After the last update my websites show ~same backlinks same toolbar PR but are not in the top ten for the main keywords like they were the last 2 years. Even [ domain-name.com ] search does not return the corresponding domain in top SERPs.
My domain names matches the main KEYWORD1-KEYWORD2.COM that they are targeting and this downfall happened only to the ones hosted on the same IP - so better play it safe!
Also check what you can see on these Google Data Centers for differing SERP results!
Msg#: 27877 posted 11:23 am on Feb 7, 2005 (gmt 0)
Yes, without a shadow of a doubt, the IP is important. It is best to have sites not only on their own IP but in different blocks. There is no need to have a unique IP however, if it is shared with other people's sites, or unrelated/linked sites then it's no problem at all. In fact, if I were Google, I would think well of it.