A question on this whitespace thing Tedster: I manage a small network of sites in various locations that pull in panels of content from a centralised domain database. It uses iFrames to do this. This content is created on the fly and very relevant to each site but consequently needs to be centrally managed.
In the new preview tool on G, where you can see an image of each site, these iFrames show as big panels of whitespace. I have as yet seen no ranking oddities after 4-5 months of having them in place, but could this potentially be an accident waiting to happen based on the above observation?